Precalculus Examples

${(\sqrt{x - 4})}^{2}$

Step 1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{x - 4}$ as ${(x - 4)}^{\frac{1}{2}}$ .

${({(x - 4)}^{\frac{1}{2}})}^{2}$

Step 2

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

${(x - 4)}^{\frac{1}{2} \cdot 2}$

Step 3

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

${(x - 4)}^{\frac{2}{2}}$

Step 4

Cancel the common factor of $2$ .

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Step 4.1

Cancel the common factor.

${(x - 4)}^{\frac{2}{2}}$

Step 4.2

Rewrite the expression.

${(x - 4)}^{1}$

Step 5

Simplify.

$x - 4$