Algebra Examples

$\sqrt{4 y} = 10$

Step 1

To remove the radical on the left side of the equation, square both sides of the equation.

${\sqrt{4 y}}^{2} = 10^{2}$

Step 2

Simplify each side of the equation.

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Step 2.1

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

${({(4 y)}^{\frac{1}{2}})}^{2} = 10^{2}$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify ${({(4 y)}^{\frac{1}{2}})}^{2}$ .

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Step 2.2.1.1

Multiply the exponents in ${({(4 y)}^{\frac{1}{2}})}^{2}$ .

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Step 2.2.1.1.1

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

${(4 y)}^{\frac{1}{2} \cdot 2} = 10^{2}$

Step 2.2.1.1.2

Cancel the common factor of $2$ .

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Step 2.2.1.1.2.1

Cancel the common factor.

${(4 y)}^{\frac{1}{2} \cdot 2} = 10^{2}$

Step 2.2.1.1.2.2

Rewrite the expression.

${(4 y)}^{1} = 10^{2}$

Step 2.2.1.2

Simplify.

$4 y = 10^{2}$

Step 2.3

Simplify the right side.

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Step 2.3.1

Raise $10$ to the power of $2$ .

$4 y = 100$

Step 3

Divide each term in $4 y = 100$ by $4$ and simplify.

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Step 3.1

Divide each term in $4 y = 100$ by $4$ .

$\frac{4 y}{4} = \frac{100}{4}$

Step 3.2

Simplify the left side.

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Step 3.2.1

Cancel the common factor of $4$ .

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Step 3.2.1.1

Cancel the common factor.

$\frac{4 y}{4} = \frac{100}{4}$

Step 3.2.1.2

Divide $y$ by $1$ .

$y = \frac{100}{4}$

Step 3.3

Simplify the right side.

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Step 3.3.1

Divide $100$ by $4$ .

$y = 25$