Question

Which of the following are solutions to the quadratic equation below?
Check all that apply.
X^2+ 8x=9
A. -3
B. 1
C. -9
D. -1
E. 3

Answer 1

Answer:

1 and -9

Step-by-step explanation:

$x^2+8x-9=0\\<=> x^2-x+9x-9=0\\<=> x(x-1)+9(x-1)=0\\<=> (x+9)(x-1)=0\\<=> x = -9 \ \ or \ \ x =1$

hope this helps