Question

Solve x2 + 15x = -56.

Options
x = 8 and x = 7
x = -8 and x = -7
x = -8 and x = 7
x = 8 and x = -7

Answer 1

x2 + 15x = -56

x^2 + 15x + 56 = 0

Factor. @Adrianna.Gongora

Answer 2

im going to do this

Answer 3

it looks fun

Answer 4

It's either A or B ;-; I know that but I don't know which one..

Answer 5

@Directrix

Answer 6

What are two numbers that multiply to 56 AND also add to 15? @Adrianna.Gongora

Answer 7

7 x 8 = 56
7 + (8) = 15

Answer 8

It's A I think

Answer 9

x^2 + 15x + 56 = 0

(x + 8) * (x + 7) = 0

x + 8 = 0 or x + 7 = 0

x = ? or x = ?

Answer 10

(X + 7 ) (X + 8)

soo
X=7 and X=8

Answer 11

No.

Answer 12

ughh ;-;

Answer 13

x + 8 = 0 or x + 7 = 0

x + 8 = 0 or x + 7 = 0
x = 0 - 8 x = 0 - 7
x = -8 x = -7

Answer 14

;-; ooh my lord so it's b?

Answer 15

x = -8 and x = -7 Correct.

Answer 16

That's what I was thinking but then you put (x + 8) * (x + 7) = 0 and I didn't see negatives so I assumes positive ._. I get messed up with negatives and positives sometimes ;-; Thanks though

Answer 17

I should have posted that I was applying the Zero Product Property.
See attachment and let me know if that clears the confusion.

Answer 18

That actually makes a lot of sense :) Thank you !

Answer 19

You are welcome.