Algebra Examples

$\sqrt{81 {(x^{5} - 2)}^{10}}$

Step 1

Rewrite $81 {(x^{5} - 2)}^{10}$ as ${(9 {(x^{5} - 2)}^{5})}^{2}$ .

$\sqrt{{(9 {(x^{5} - 2)}^{5})}^{2}}$

Step 2

Pull terms out from under the radical, assuming positive real numbers.

$9 {(x^{5} - 2)}^{5}$

Step 3

Use the Binomial Theorem.

$9 ({(x^{5})}^{5} + 5 {(x^{5})}^{4} \cdot - 2 + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4

Simplify terms.

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Step 4.1

Simplify each term.

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Step 4.1.1

Multiply the exponents in ${(x^{5})}^{5}$ .

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Step 4.1.1.1

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

$9 (x^{5 \cdot 5} + 5 {(x^{5})}^{4} \cdot - 2 + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.1.2

Multiply $5$ by $5$ .

$9 (x^{25} + 5 {(x^{5})}^{4} \cdot - 2 + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.2

Multiply the exponents in ${(x^{5})}^{4}$ .

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Step 4.1.2.1

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

$9 (x^{25} + 5 x^{5 \cdot 4} \cdot - 2 + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.2.2

Multiply $5$ by $4$ .

$9 (x^{25} + 5 x^{20} \cdot - 2 + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.3

Multiply $- 2$ by $5$ .

$9 (x^{25} - 10 x^{20} + 10 {(x^{5})}^{3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.4

Multiply the exponents in ${(x^{5})}^{3}$ .

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Step 4.1.4.1

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

$9 (x^{25} - 10 x^{20} + 10 x^{5 \cdot 3} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.4.2

Multiply $5$ by $3$ .

$9 (x^{25} - 10 x^{20} + 10 x^{15} {(- 2)}^{2} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.5

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

$9 (x^{25} - 10 x^{20} + 10 x^{15} \cdot 4 + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.6

Multiply $4$ by $10$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} + 10 {(x^{5})}^{2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.7

Multiply the exponents in ${(x^{5})}^{2}$ .

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Step 4.1.7.1

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

$9 (x^{25} - 10 x^{20} + 40 x^{15} + 10 x^{5 \cdot 2} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.7.2

Multiply $5$ by $2$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} + 10 x^{10} {(- 2)}^{3} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.8

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

$9 (x^{25} - 10 x^{20} + 40 x^{15} + 10 x^{10} \cdot - 8 + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.9

Multiply $- 8$ by $10$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} - 80 x^{10} + 5 x^{5} {(- 2)}^{4} + {(- 2)}^{5})$

Step 4.1.10

Raise $- 2$ to the power of $4$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} - 80 x^{10} + 5 x^{5} \cdot 16 + {(- 2)}^{5})$

Step 4.1.11

Multiply $16$ by $5$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} - 80 x^{10} + 80 x^{5} + {(- 2)}^{5})$

Step 4.1.12

Raise $- 2$ to the power of $5$ .

$9 (x^{25} - 10 x^{20} + 40 x^{15} - 80 x^{10} + 80 x^{5} - 32)$

Step 4.2

Apply the distributive property.

$9 x^{25} + 9 (- 10 x^{20}) + 9 (40 x^{15}) + 9 (- 80 x^{10}) + 9 (80 x^{5}) + 9 \cdot - 32$

Step 5

Simplify.

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Step 5.1

Multiply $- 10$ by $9$ .

$9 x^{25} - 90 x^{20} + 9 (40 x^{15}) + 9 (- 80 x^{10}) + 9 (80 x^{5}) + 9 \cdot - 32$

Step 5.2

Multiply $40$ by $9$ .

$9 x^{25} - 90 x^{20} + 360 x^{15} + 9 (- 80 x^{10}) + 9 (80 x^{5}) + 9 \cdot - 32$

Step 5.3

Multiply $- 80$ by $9$ .

$9 x^{25} - 90 x^{20} + 360 x^{15} - 720 x^{10} + 9 (80 x^{5}) + 9 \cdot - 32$

Step 5.4

Multiply $80$ by $9$ .

$9 x^{25} - 90 x^{20} + 360 x^{15} - 720 x^{10} + 720 x^{5} + 9 \cdot - 32$

Step 5.5

Multiply $9$ by $- 32$ .

$9 x^{25} - 90 x^{20} + 360 x^{15} - 720 x^{10} + 720 x^{5} - 288$