Solve Using the Quadratic Formula x^2-7x=44

$x^{2} - 7 x = 44$

Step 1

Subtract $44$ from both sides of the equation.

$x^{2} - 7 x - 44 = 0$

Step 2

Use the quadratic formula to find the solutions.

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

Step 3

Substitute the values $a = 1$ , $b = - 7$ , and $c = - 44$ into the quadratic formula and solve for $x$ .

$\frac{7 \pm \sqrt{{(- 7)}^{2} - 4 \cdot (1 \cdot - 44)}}{2 \cdot 1}$

Step 4

Simplify.

Simplify the numerator.

Raise $- 7$ to the power of $2$ .

$x = \frac{7 \pm \sqrt{49 - 4 \cdot 1 \cdot - 44}}{2 \cdot 1}$

Multiply $- 4 \cdot 1 \cdot - 44$ .

Multiply $- 4$ by $1$ .

$x = \frac{7 \pm \sqrt{49 - 4 \cdot - 44}}{2 \cdot 1}$

Multiply $- 4$ by $- 44$ .

$x = \frac{7 \pm \sqrt{49 + 176}}{2 \cdot 1}$

Add $49$ and $176$ .

$x = \frac{7 \pm \sqrt{225}}{2 \cdot 1}$

Rewrite $225$ as $15^{2}$ .

$x = \frac{7 \pm \sqrt{15^{2}}}{2 \cdot 1}$

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

$x = \frac{7 \pm 15}{2 \cdot 1}$

Multiply $2$ by $1$ .

$x = \frac{7 \pm 15}{2}$

Step 5

The final answer is the combination of both solutions.

$x = 11, - 4$