Question

Solve x2 - 8x - 9 = 0.

Rewrite the equation so that it is of the form
x2 + bx = c.

Answer 1

x^2 - 8x-9=0
D = b^2- 4*a*c = 64- 4* (-9) = 64+36=100 =10^2
X1 = (8-10)/2 = -1
X2= (8+10)/2= 9

Answer 2

1. x^2 + -8x = 9

2. for the next part it is add 16

3. after that it is (x - 4)^2 = 25

4. the last one is -1 and 9

Explanation:

i know this is wayy late but in case anyone needs it :)