Question

Could some help me solve this?
x2 + 15x = -56

x = 8 and x = 7

x = -8 and x = -7

x = -8 and x = 7

x = 8 and x = -7

Answer 1

I think it's the first choice, but I'm not sure

Answer 2

the first choice is correct ^_^

Answer 3

Okay thanks :)

Answer 4

oh, sorry sorry, haha
its the second choice

Answer 5

because
(x+8)(x+7)
then we do
0=(x+8), so x=-8
0=(x+7), so x=-7

Answer 6

Oh Okay, I get what your saying! Thanks for the help ^-^