Pre-Algebra Examples

$\frac{4 \sqrt{2 x + 7} - \frac{8 x}{2 \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 1

Cancel the common factor of $8$ and $2$ .

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Step 1.1

Factor $2$ out of $8 x$ .

$\frac{4 \sqrt{2 x + 7} - \frac{2 (4 x)}{2 \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 1.2

Cancel the common factors.

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Step 1.2.1

Factor $2$ out of $2 \sqrt{2 x + 7}$ .

$\frac{4 \sqrt{2 x + 7} - \frac{2 (4 x)}{2 (\sqrt{2 x + 7})} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 1.2.2

Cancel the common factor.

$\frac{4 \sqrt{2 x + 7} - \frac{2 (4 x)}{2 \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 1.2.3

Rewrite the expression.

$\frac{4 \sqrt{2 x + 7} - \frac{4 x}{\sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 2

Multiply $\frac{4 x}{\sqrt{2 x + 7}}$ by $\frac{\sqrt{2 x + 7}}{\sqrt{2 x + 7}}$ .

$\frac{4 \sqrt{2 x + 7} - (\frac{4 x}{\sqrt{2 x + 7}} \cdot \frac{\sqrt{2 x + 7}}{\sqrt{2 x + 7}}) + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3

Combine and simplify the denominator.

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Step 3.1

Multiply $\frac{4 x}{\sqrt{2 x + 7}}$ by $\frac{\sqrt{2 x + 7}}{\sqrt{2 x + 7}}$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{\sqrt{2 x + 7} \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.2

Raise $\sqrt{2 x + 7}$ to the power of $1$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{\sqrt{2 x + 7}}^{1} \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.3

Raise $\sqrt{2 x + 7}$ to the power of $1$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{\sqrt{2 x + 7}}^{1} {\sqrt{2 x + 7}}^{1}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.4

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{\sqrt{2 x + 7}}^{1 + 1}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.5

Add $1$ and $1$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{\sqrt{2 x + 7}}^{2}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6

Rewrite ${\sqrt{2 x + 7}}^{2}$ as $2 x + 7$ .

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Step 3.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x + 7}$ as ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{({(2 x + 7)}^{\frac{1}{2}})}^{2}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6.2

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{(2 x + 7)}^{\frac{1}{2} \cdot 2}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{(2 x + 7)}^{\frac{2}{2}}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6.4

Cancel the common factor of $2$ .

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Step 3.6.4.1

Cancel the common factor.

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{(2 x + 7)}^{\frac{2}{2}}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6.4.2

Rewrite the expression.

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{{(2 x + 7)}^{1}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 3.6.5

Simplify.

$\frac{4 \sqrt{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{2 x + 7} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 4

To write $4 \sqrt{2 x + 7}$ as a fraction with a common denominator, multiply by $\frac{2 x + 7}{2 x + 7}$ .

$\frac{\frac{4 \sqrt{2 x + 7} (2 x + 7)}{2 x + 7} - \frac{4 x \sqrt{2 x + 7}}{2 x + 7} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 5

Combine the numerators over the common denominator.

$\frac{\frac{4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}}{2 x + 7} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 6

To write $\frac{4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}}{2 x + 7}$ as a fraction with a common denominator, multiply by $\frac{2 \sqrt{2 x + 7}}{2 \sqrt{2 x + 7}}$ .

$\frac{\frac{4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}}{2 x + 7} \cdot \frac{2 \sqrt{2 x + 7}}{2 \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}}}{2 x + 7}$

Step 7

To write $\frac{6}{2 \sqrt{2 x + 7}}$ as a fraction with a common denominator, multiply by $\frac{2 x + 7}{2 x + 7}$ .

$\frac{\frac{4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}}{2 x + 7} \cdot \frac{2 \sqrt{2 x + 7}}{2 \sqrt{2 x + 7}} + \frac{6}{2 \sqrt{2 x + 7}} \cdot \frac{2 x + 7}{2 x + 7}}{2 x + 7}$

Step 8

Write each expression with a common denominator of $(2 x + 7) \cdot 2 \sqrt{2 x + 7}$ , by multiplying each by an appropriate factor of $1$ .

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Step 8.1

Multiply $\frac{4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}}{2 x + 7}$ by $\frac{2 \sqrt{2 x + 7}}{2 \sqrt{2 x + 7}}$ .

$\frac{\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) (2 \sqrt{2 x + 7})}{(2 x + 7) (2 \sqrt{2 x + 7})} + \frac{6}{2 \sqrt{2 x + 7}} \cdot \frac{2 x + 7}{2 x + 7}}{2 x + 7}$

Step 8.2

Multiply $\frac{6}{2 \sqrt{2 x + 7}}$ by $\frac{2 x + 7}{2 x + 7}$ .

$\frac{\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) (2 \sqrt{2 x + 7})}{(2 x + 7) (2 \sqrt{2 x + 7})} + \frac{6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 8.3

Reorder the factors of $(2 x + 7) (2 \sqrt{2 x + 7})$ .

$\frac{\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) (2 \sqrt{2 x + 7})}{2 \sqrt{2 x + 7} (2 x + 7)} + \frac{6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 9

Combine the numerators over the common denominator.

$\frac{\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) (2 \sqrt{2 x + 7}) + 6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10

Rewrite $\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) (2 \sqrt{2 x + 7}) + 6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}$ in a factored form.

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Step 10.1

Remove parentheses.

$\frac{\frac{(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7} + 6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.2

Factor $2$ out of $(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7} + 6 (2 x + 7)$ .

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Step 10.2.1

Factor $2$ out of $(4 \sqrt{2 x + 7} (2 x + 7) - 4 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7}$ .

$\frac{\frac{2 ((2 \sqrt{2 x + 7} (2 x + 7) - 2 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7}) + 6 (2 x + 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.2.2

Factor $2$ out of $6 (2 x + 7)$ .

$\frac{\frac{2 ((2 \sqrt{2 x + 7} (2 x + 7) - 2 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7}) + 2 (3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.2.3

Factor $2$ out of $2 ((2 \sqrt{2 x + 7} (2 x + 7) - 2 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7}) + 2 (3 (2 x + 7))$ .

$\frac{\frac{2 ((2 \sqrt{2 x + 7} (2 x + 7) - 2 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.3

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x + 7}$ as ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{1}{2}} (2 x + 7) - 2 x \sqrt{2 x + 7}) \cdot 2 \sqrt{2 x + 7} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.4

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x + 7}$ as ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{1}{2}} (2 x + 7) - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 \sqrt{2 x + 7} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.5

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x + 7}$ as ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{1}{2}} (2 x + 7) - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6

Multiply ${(2 x + 7)}^{\frac{1}{2}}$ by $2 x + 7$ by adding the exponents.

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Step 10.6.1

Move $2 x + 7$ .

$\frac{\frac{2 ((2 ((2 x + 7) {(2 x + 7)}^{\frac{1}{2}}) - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6.2

Multiply $2 x + 7$ by ${(2 x + 7)}^{\frac{1}{2}}$ .

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Step 10.6.2.1

Raise $2 x + 7$ to the power of $1$ .

$\frac{\frac{2 ((2 ({(2 x + 7)}^{1} {(2 x + 7)}^{\frac{1}{2}}) - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6.2.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{\frac{2 ((2 {(2 x + 7)}^{1 + \frac{1}{2}} - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6.3

Write $1$ as a fraction with a common denominator.

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{2}{2} + \frac{1}{2}} - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6.4

Combine the numerators over the common denominator.

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{2 + 1}{2}} - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.6.5

Add $2$ and $1$ .

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{3}{2}} - 2 x {(2 x + 7)}^{\frac{1}{2}}) \cdot 2 {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.7

Apply the distributive property.

$\frac{\frac{2 ((2 {(2 x + 7)}^{\frac{3}{2}} \cdot 2 - 2 x {(2 x + 7)}^{\frac{1}{2}} \cdot 2) {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.8

Multiply $2$ by $2$ .

$\frac{\frac{2 ((4 {(2 x + 7)}^{\frac{3}{2}} - 2 x {(2 x + 7)}^{\frac{1}{2}} \cdot 2) {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.9

Multiply $2$ by $- 2$ .

$\frac{\frac{2 ((4 {(2 x + 7)}^{\frac{3}{2}} - 4 x {(2 x + 7)}^{\frac{1}{2}}) {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.10

Apply the distributive property.

$\frac{\frac{2 (4 {(2 x + 7)}^{\frac{3}{2}} {(2 x + 7)}^{\frac{1}{2}} - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.11

Multiply ${(2 x + 7)}^{\frac{3}{2}}$ by ${(2 x + 7)}^{\frac{1}{2}}$ by adding the exponents.

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Step 10.11.1

Move ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{\frac{2 (4 ({(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{3}{2}}) - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.11.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{\frac{2 (4 {(2 x + 7)}^{\frac{1}{2} + \frac{3}{2}} - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.11.3

Combine the numerators over the common denominator.

$\frac{\frac{2 (4 {(2 x + 7)}^{\frac{1 + 3}{2}} - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.11.4

Add $1$ and $3$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{\frac{4}{2}} - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.11.5

Divide $4$ by $2$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x {(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.12

Multiply ${(2 x + 7)}^{\frac{1}{2}}$ by ${(2 x + 7)}^{\frac{1}{2}}$ by adding the exponents.

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Step 10.12.1

Move ${(2 x + 7)}^{\frac{1}{2}}$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x ({(2 x + 7)}^{\frac{1}{2}} {(2 x + 7)}^{\frac{1}{2}}) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.12.2

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x {(2 x + 7)}^{\frac{1}{2} + \frac{1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.12.3

Combine the numerators over the common denominator.

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x {(2 x + 7)}^{\frac{1 + 1}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.12.4

Add $1$ and $1$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x {(2 x + 7)}^{\frac{2}{2}} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.12.5

Divide $2$ by $2$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x {(2 x + 7)}^{1} + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.13

Simplify $- 4 x {(2 x + 7)}^{1}$ .

$\frac{\frac{2 (4 {(2 x + 7)}^{2} - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14

Simplify each term.

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Step 10.14.1

Rewrite ${(2 x + 7)}^{2}$ as $(2 x + 7) (2 x + 7)$ .

$\frac{\frac{2 (4 ((2 x + 7) (2 x + 7)) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.2

Expand $(2 x + 7) (2 x + 7)$ using the FOIL Method.

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Step 10.14.2.1

Apply the distributive property.

$\frac{\frac{2 (4 (2 x (2 x + 7) + 7 (2 x + 7)) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.2.2

Apply the distributive property.

$\frac{\frac{2 (4 (2 x (2 x) + 2 x \cdot 7 + 7 (2 x + 7)) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.2.3

Apply the distributive property.

$\frac{\frac{2 (4 (2 x (2 x) + 2 x \cdot 7 + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3

Simplify and combine like terms.

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Step 10.14.3.1

Simplify each term.

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Step 10.14.3.1.1

Rewrite using the commutative property of multiplication.

$\frac{\frac{2 (4 (2 \cdot 2 x \cdot x + 2 x \cdot 7 + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.2

Multiply $x$ by $x$ by adding the exponents.

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Step 10.14.3.1.2.1

Move $x$ .

$\frac{\frac{2 (4 (2 \cdot 2 (x \cdot x) + 2 x \cdot 7 + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.2.2

Multiply $x$ by $x$ .

$\frac{\frac{2 (4 (2 \cdot 2 x^{2} + 2 x \cdot 7 + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.3

Multiply $2$ by $2$ .

$\frac{\frac{2 (4 (4 x^{2} + 2 x \cdot 7 + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.4

Multiply $7$ by $2$ .

$\frac{\frac{2 (4 (4 x^{2} + 14 x + 7 (2 x) + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.5

Multiply $2$ by $7$ .

$\frac{\frac{2 (4 (4 x^{2} + 14 x + 14 x + 7 \cdot 7) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.1.6

Multiply $7$ by $7$ .

$\frac{\frac{2 (4 (4 x^{2} + 14 x + 14 x + 49) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.3.2

Add $14 x$ and $14 x$ .

$\frac{\frac{2 (4 (4 x^{2} + 28 x + 49) - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.4

Apply the distributive property.

$\frac{\frac{2 (4 (4 x^{2}) + 4 (28 x) + 4 \cdot 49 - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.5

Simplify.

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Step 10.14.5.1

Multiply $4$ by $4$ .

$\frac{\frac{2 (16 x^{2} + 4 (28 x) + 4 \cdot 49 - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.5.2

Multiply $28$ by $4$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 4 \cdot 49 - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.5.3

Multiply $4$ by $49$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 x (2 x + 7) + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.6

Apply the distributive property.

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 x (2 x) - 4 x \cdot 7 + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.7

Rewrite using the commutative property of multiplication.

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 \cdot 2 x \cdot x - 4 x \cdot 7 + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.8

Multiply $7$ by $- 4$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 \cdot 2 x \cdot x - 28 x + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.9

Simplify each term.

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Step 10.14.9.1

Multiply $x$ by $x$ by adding the exponents.

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Step 10.14.9.1.1

Move $x$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 \cdot 2 (x \cdot x) - 28 x + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.9.1.2

Multiply $x$ by $x$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 4 \cdot 2 x^{2} - 28 x + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.14.9.2

Multiply $- 4$ by $2$ .

$\frac{\frac{2 (16 x^{2} + 112 x + 196 - 8 x^{2} - 28 x + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.15

Subtract $8 x^{2}$ from $16 x^{2}$ .

$\frac{\frac{2 (8 x^{2} + 112 x + 196 - 28 x + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.16

Subtract $28 x$ from $112 x$ .

$\frac{\frac{2 (8 x^{2} + 84 x + 196 + 3 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.17

Apply the distributive property.

$\frac{\frac{2 (8 x^{2} + 84 x + 196 + 3 (2 x) + 3 \cdot 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.18

Multiply $2$ by $3$ .

$\frac{\frac{2 (8 x^{2} + 84 x + 196 + 6 x + 3 \cdot 7)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.19

Multiply $3$ by $7$ .

$\frac{\frac{2 (8 x^{2} + 84 x + 196 + 6 x + 21)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.20

Add $84 x$ and $6 x$ .

$\frac{\frac{2 (8 x^{2} + 90 x + 196 + 21)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.21

Add $196$ and $21$ .

$\frac{\frac{2 (8 x^{2} + 90 x + 217)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22

Factor.

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Step 10.22.1

Factor by grouping.

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Step 10.22.1.1

For a polynomial of the form $a x^{2} + b x + c$ , rewrite the middle term as a sum of two terms whose product is $a \cdot c = 8 \cdot 217 = 1736$ and whose sum is $b = 90$ .

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Step 10.22.1.1.1

Factor $90$ out of $90 x$ .

$\frac{\frac{2 (8 x^{2} + 90 (x) + 217)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.1.1.2

Rewrite $90$ as $28$ plus $62$

$\frac{\frac{2 (8 x^{2} + (28 + 62) x + 217)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.1.1.3

Apply the distributive property.

$\frac{\frac{2 (8 x^{2} + 28 x + 62 x + 217)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.1.2

Factor out the greatest common factor from each group.

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Step 10.22.1.2.1

Group the first two terms and the last two terms.

$\frac{\frac{2 ((8 x^{2} + 28 x) + 62 x + 217)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.1.2.2

Factor out the greatest common factor (GCF) from each group.

$\frac{\frac{2 (4 x (2 x + 7) + 31 (2 x + 7))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.1.3

Factor the polynomial by factoring out the greatest common factor, $2 x + 7$ .

$\frac{\frac{2 ((2 x + 7) (4 x + 31))}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.22.2

Remove unnecessary parentheses.

$\frac{\frac{2 (2 x + 7) (4 x + 31)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.23

Reduce the expression $\frac{2 (2 x + 7) (4 x + 31)}{2 \sqrt{2 x + 7} (2 x + 7)}$ by cancelling the common factors.

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Step 10.23.1

Cancel the common factor.

$\frac{\frac{2 (2 x + 7) (4 x + 31)}{2 \sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 10.23.2

Rewrite the expression.

$\frac{\frac{(2 x + 7) (4 x + 31)}{\sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 11

Reduce the expression $\frac{(2 x + 7) (4 x + 31)}{\sqrt{2 x + 7} (2 x + 7)}$ by cancelling the common factors.

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Step 11.1

Cancel the common factor.

$\frac{\frac{(2 x + 7) (4 x + 31)}{\sqrt{2 x + 7} (2 x + 7)}}{2 x + 7}$

Step 11.2

Rewrite the expression.

$\frac{\frac{4 x + 31}{\sqrt{2 x + 7}}}{2 x + 7}$