Algebra Examples

$\sqrt{3 x - 5} = \sqrt{2 x + 25}$

Step 1

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

${\sqrt{3 x - 5}}^{2} = {\sqrt{2 x + 25}}^{2}$

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 $\sqrt{3 x - 5}$ as ${(3 x - 5)}^{\frac{1}{2}}$ .

${({(3 x - 5)}^{\frac{1}{2}})}^{2} = {\sqrt{2 x + 25}}^{2}$

Step 2.2

Simplify the left side.

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Step 2.2.1

Simplify ${({(3 x - 5)}^{\frac{1}{2}})}^{2}$ .

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Step 2.2.1.1

Multiply the exponents in ${({(3 x - 5)}^{\frac{1}{2}})}^{2}$ .

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Step 2.2.1.1.1

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

${(3 x - 5)}^{\frac{1}{2} \cdot 2} = {\sqrt{2 x + 25}}^{2}$

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.

${(3 x - 5)}^{\frac{1}{2} \cdot 2} = {\sqrt{2 x + 25}}^{2}$

Step 2.2.1.1.2.2

Rewrite the expression.

${(3 x - 5)}^{1} = {\sqrt{2 x + 25}}^{2}$

Step 2.2.1.2

Simplify.

$3 x - 5 = {\sqrt{2 x + 25}}^{2}$

Step 2.3

Simplify the right side.

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Step 2.3.1

Rewrite ${\sqrt{2 x + 25}}^{2}$ as $2 x + 25$ .

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Step 2.3.1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x + 25}$ as ${(2 x + 25)}^{\frac{1}{2}}$ .

$3 x - 5 = {({(2 x + 25)}^{\frac{1}{2}})}^{2}$

Step 2.3.1.2

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

$3 x - 5 = {(2 x + 25)}^{\frac{1}{2} \cdot 2}$

Step 2.3.1.3

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

$3 x - 5 = {(2 x + 25)}^{\frac{2}{2}}$

Step 2.3.1.4

Cancel the common factor of $2$ .

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Step 2.3.1.4.1

Cancel the common factor.

$3 x - 5 = {(2 x + 25)}^{\frac{2}{2}}$

Step 2.3.1.4.2

Rewrite the expression.

$3 x - 5 = {(2 x + 25)}^{1}$

Step 2.3.1.5

Simplify.

$3 x - 5 = 2 x + 25$

Step 3

Solve for $x$ .

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Step 3.1

Move all terms containing $x$ to the left side of the equation.

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Step 3.1.1

Subtract $2 x$ from both sides of the equation.

$3 x - 5 - 2 x = 25$

Step 3.1.2

Subtract $2 x$ from $3 x$ .

$x - 5 = 25$

Step 3.2

Move all terms not containing $x$ to the right side of the equation.

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Step 3.2.1

Add $5$ to both sides of the equation.

$x = 25 + 5$

Step 3.2.2

Add $25$ and $5$ .

$x = 30$