Question

What are the solutions to the equation y= x^2 + 2x - 15
F. -3 and 5
G. 3 and -5
H. 3 and 5
J. There is no solution

Answer 1

Just subsitute the numbre 3 and -3 and if you get the other number, then that's the answer.

Answer 2

Factor the equation
You know the factors of 15 are 3 and 5
find the combination that when you add you get +2 and when you multiply you get -15
if you get F then you are correct

-3 + 5 = +2 coefficient of x and (-3)(5) = -15 the constant c