Question

Solve by completing the square to get x

Answer 1

Explanation:

the factors of -15 that add to get -2 is -5 and 3

you get x^2 - 5x + 3x -15 = 0

group the left two and right two and take out the greatest common factor

x(x-5)+3(x-5) = 0

(x+3)(x-5) = 0

x=-3 and 5