Question

solve $x^2 - 8x - 9 = 0$. rewrite the equation so that it is of the form $x^2 + bx = c$. $x^2 + \square x = \square$

Explanation:

Step1: Isolate $x^2-8x$

Add 9 to both sides.
$x^2 - 8x - 9 + 9 = 0 + 9$

Step2: Simplify to match the form

Simplify both sides of the equation.
$x^2 + (-8)x = 9$

Answer:

$x^2 + \boldsymbol{-8}x = \boldsymbol{9}$