Solve by Factoring square root of 8x-9=1

$\sqrt{8 x - 9} = 1$

Step 1

Subtract $1$ from both sides of the equation.

$\sqrt{8 x - 9} - 1 = 0$

Step 2

Add $1$ to both sides of the equation.

$\sqrt{8 x - 9} = 1$

Step 3

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

${\sqrt{8 x - 9}}^{2} = 1^{2}$

Step 4

Simplify each side of the equation.

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{8 x - 9}$ as ${(8 x - 9)}^{\frac{1}{2}}$ .

${({(8 x - 9)}^{\frac{1}{2}})}^{2} = 1^{2}$

Simplify the left side.

Simplify ${({(8 x - 9)}^{\frac{1}{2}})}^{2}$ .

Multiply the exponents in ${({(8 x - 9)}^{\frac{1}{2}})}^{2}$ .

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

${(8 x - 9)}^{\frac{1}{2} \cdot 2} = 1^{2}$

Cancel the common factor of $2$ .

Cancel the common factor.

${(8 x - 9)}^{\frac{1}{2} \cdot 2} = 1^{2}$

Rewrite the expression.

${(8 x - 9)}^{1} = 1^{2}$

Simplify.

$8 x - 9 = 1^{2}$

Simplify the right side.

One to any power is one.

$8 x - 9 = 1$

Step 5

Solve for $x$ .

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

Add $9$ to both sides of the equation.

$8 x = 1 + 9$

Add $1$ and $9$ .

$8 x = 10$

Divide each term in $8 x = 10$ by $8$ and simplify.

Divide each term in $8 x = 10$ by $8$ .

$\frac{8 x}{8} = \frac{10}{8}$

Simplify the left side.

Cancel the common factor of $8$ .

Cancel the common factor.

$\frac{8 x}{8} = \frac{10}{8}$

Divide $x$ by $1$ .

$x = \frac{10}{8}$

Simplify the right side.

Cancel the common factor of $10$ and $8$ .

Factor $2$ out of $10$ .

$x = \frac{2 (5)}{8}$

Cancel the common factors.

Factor $2$ out of $8$ .

$x = \frac{2 \cdot 5}{2 \cdot 4}$

Cancel the common factor.

$x = \frac{2 \cdot 5}{2 \cdot 4}$

Rewrite the expression.

$x = \frac{5}{4}$

Solve by Factoring square root of 8x-9=1

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