Answer:
x=9 x=-1
Step-by-step explanation:
We can factor
x^2 -8x-9 =0
What 2 numbers multiply to -9 and add to -8
-9*1 = -9
-9 +1 = -8
(x-9) (x+1) =0
Using the zero product property
x-9 =0 x+1 =0
