Finite Math Examples

${(\sqrt{5} p - 2 r^{4})}^{3}$

Step 1

Use the Binomial Theorem.

${(\sqrt{5} p)}^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2

Simplify each term.

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Step 2.1

Apply the product rule to $\sqrt{5} p$ .

${\sqrt{5}}^{3} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.2

Rewrite ${\sqrt{5}}^{3}$ as $\sqrt{5^{3}}$ .

$\sqrt{5^{3}} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.3

Raise $5$ to the power of $3$ .

$\sqrt{125} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.4

Rewrite $125$ as $5^{2} \cdot 5$ .

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Step 2.4.1

Factor $25$ out of $125$ .

$\sqrt{25 (5)} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.4.2

Rewrite $25$ as $5^{2}$ .

$\sqrt{5^{2} \cdot 5} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.5

Pull terms out from under the radical.

$5 \sqrt{5} p^{3} + 3 {(\sqrt{5} p)}^{2} (- 2 r^{4}) + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.6

Rewrite using the commutative property of multiplication.

$5 \sqrt{5} p^{3} + 3 \cdot - 2 {(\sqrt{5} p)}^{2} r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.7

Multiply $3$ by $- 2$ .

$5 \sqrt{5} p^{3} - 6 {(\sqrt{5} p)}^{2} r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.8

Apply the product rule to $\sqrt{5} p$ .

$5 \sqrt{5} p^{3} - 6 ({\sqrt{5}}^{2} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9

Rewrite ${\sqrt{5}}^{2}$ as $5$ .

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Step 2.9.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{5}$ as $5^{\frac{1}{2}}$ .

$5 \sqrt{5} p^{3} - 6 ({(5^{\frac{1}{2}})}^{2} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9.2

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

$5 \sqrt{5} p^{3} - 6 (5^{\frac{1}{2} \cdot 2} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9.3

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

$5 \sqrt{5} p^{3} - 6 (5^{\frac{2}{2}} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9.4

Cancel the common factor of $2$ .

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Step 2.9.4.1

Cancel the common factor.

$5 \sqrt{5} p^{3} - 6 (5^{\frac{2}{2}} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9.4.2

Rewrite the expression.

$5 \sqrt{5} p^{3} - 6 (5^{1} p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.9.5

Evaluate the exponent.

$5 \sqrt{5} p^{3} - 6 (5 p^{2}) r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.10

Multiply $5$ by $- 6$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 3 (\sqrt{5} p) {(- 2 r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.11

Apply the product rule to $- 2 r^{4}$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 3 \sqrt{5} p ({(- 2)}^{2} {(r^{4})}^{2}) + {(- 2 r^{4})}^{3}$

Step 2.12

Rewrite using the commutative property of multiplication.

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 3 \sqrt{5} \cdot {(- 2)}^{2} p {(r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.13

Raise $- 2$ to the power of $2$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 3 \sqrt{5} \cdot 4 p {(r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.14

Multiply $4$ by $3$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p {(r^{4})}^{2} + {(- 2 r^{4})}^{3}$

Step 2.15

Multiply the exponents in ${(r^{4})}^{2}$ .

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Step 2.15.1

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

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{4 \cdot 2} + {(- 2 r^{4})}^{3}$

Step 2.15.2

Multiply $4$ by $2$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{8} + {(- 2 r^{4})}^{3}$

Step 2.16

Apply the product rule to $- 2 r^{4}$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{8} + {(- 2)}^{3} {(r^{4})}^{3}$

Step 2.17

Raise $- 2$ to the power of $3$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{8} - 8 {(r^{4})}^{3}$

Step 2.18

Multiply the exponents in ${(r^{4})}^{3}$ .

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Step 2.18.1

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

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{8} - 8 r^{4 \cdot 3}$

Step 2.18.2

Multiply $4$ by $3$ .

$5 \sqrt{5} p^{3} - 30 p^{2} r^{4} + 12 \sqrt{5} p r^{8} - 8 r^{12}$