First you subtract x² on both sides to get:
0 = 9x + 6 - x² or -x² + 9x + 6 = 0 ------> (ax² + bx + c)
a = -1
b = 9
c = 6
The quadratic formula is:
x = [tex]\frac{-b ± \sqrt{b^{2} - 4ac} }{2a}[/tex]
Now you plug it in.
The answer should be the third one
