Solve Using the Quadratic Formula 9x^2-2x=0

$9 x^{2} - 2 x = 0$

Step 1

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

Step 2

Substitute the values $a = 9$ , $b = - 2$ , and $c = 0$ into the quadratic formula and solve for $x$ .

$\frac{2 \pm \sqrt{{(- 2)}^{2} - 4 \cdot (9 \cdot 0)}}{2 \cdot 9}$

Step 3

Simplify.

Simplify the numerator.

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

$x = \frac{2 \pm \sqrt{4 - 4 \cdot 9 \cdot 0}}{2 \cdot 9}$

Multiply $- 4 \cdot 9 \cdot 0$ .

Multiply $- 4$ by $9$ .

$x = \frac{2 \pm \sqrt{4 - 36 \cdot 0}}{2 \cdot 9}$

Multiply $- 36$ by $0$ .

$x = \frac{2 \pm \sqrt{4 + 0}}{2 \cdot 9}$

Add $4$ and $0$ .

$x = \frac{2 \pm \sqrt{4}}{2 \cdot 9}$

Rewrite $4$ as $2^{2}$ .

$x = \frac{2 \pm \sqrt{2^{2}}}{2 \cdot 9}$

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

$x = \frac{2 \pm 2}{2 \cdot 9}$

Multiply $2$ by $9$ .

$x = \frac{2 \pm 2}{18}$

Simplify $\frac{2 \pm 2}{18}$ .

$x = \frac{1 \pm 1}{9}$

Step 4

The final answer is the combination of both solutions.

$x = \frac{2}{9}, 0$