Question

Solve x2 + 9x + 9 = 0.

Answer 1

x2 + 9x + 9 = 0

2+9x+9 = 11x+9=0

11x+9-9=0-9

11x = -9

11x/11 -9/11

x = -9/11

Answer 2

where did you get the 11?

Answer 3

is x2 = x^2?

Answer 4

x^2 +9x +9 = 0 solve it using discriminant

D = b^2 -4ac so D= 81 -36 = 45

x_1,2 = (-9+/- sqrt45)/2 = (-9 +/- 3sqrt5)/2

hope this will help you

Answer 5

Agree with jhonny. The discriminant (45) is positive; therefore, this quadratic equation has two real, unequal, roots.

@sunnymadison: how would you check these results?