Basic Math Examples

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

Step 1

Expand $(7 - \sqrt{3}) (4 + \sqrt{3})$ using the FOIL Method.

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Step 1.1

Apply the distributive property.

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

Step 1.2

Apply the distributive property.

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

Step 1.3

Apply the distributive property.

$7 \cdot 4 + 7 \sqrt{3} - \sqrt{3} \cdot 4 - \sqrt{3} \sqrt{3}$

Step 2

Simplify and combine like terms.

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Step 2.1

Simplify each term.

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Step 2.1.1

Multiply $7$ by $4$ .

$28 + 7 \sqrt{3} - \sqrt{3} \cdot 4 - \sqrt{3} \sqrt{3}$

Step 2.1.2

Multiply $4$ by $- 1$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - \sqrt{3} \sqrt{3}$

Step 2.1.3

Multiply $- \sqrt{3} \sqrt{3}$ .

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Step 2.1.3.1

Raise $\sqrt{3}$ to the power of $1$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - ({\sqrt{3}}^{1} \sqrt{3})$

Step 2.1.3.2

Raise $\sqrt{3}$ to the power of $1$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - ({\sqrt{3}}^{1} {\sqrt{3}}^{1})$

Step 2.1.3.3

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

$28 + 7 \sqrt{3} - 4 \sqrt{3} - {\sqrt{3}}^{1 + 1}$

Step 2.1.3.4

Add $1$ and $1$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - {\sqrt{3}}^{2}$

Step 2.1.4

Rewrite ${\sqrt{3}}^{2}$ as $3$ .

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Step 2.1.4.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{3}$ as $3^{\frac{1}{2}}$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - {(3^{\frac{1}{2}})}^{2}$

Step 2.1.4.2

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

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 3^{\frac{1}{2} \cdot 2}$

Step 2.1.4.3

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

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 3^{\frac{2}{2}}$

Step 2.1.4.4

Cancel the common factor of $2$ .

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Step 2.1.4.4.1

Cancel the common factor.

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 3^{\frac{2}{2}}$

Step 2.1.4.4.2

Rewrite the expression.

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 3^{1}$

Step 2.1.4.5

Evaluate the exponent.

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 1 \cdot 3$

Step 2.1.5

Multiply $- 1$ by $3$ .

$28 + 7 \sqrt{3} - 4 \sqrt{3} - 3$

Step 2.2

Subtract $3$ from $28$ .

$25 + 7 \sqrt{3} - 4 \sqrt{3}$

Step 2.3

Subtract $4 \sqrt{3}$ from $7 \sqrt{3}$ .

$25 + 3 \sqrt{3}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$25 + 3 \sqrt{3}$

Decimal Form:

$30.19615242 \dots$