Question

find the answer for this quadratic equation by using root formula X square + 8 x + 15 is equal to zero

Answer 1

I hope this may help you

Answer 2

x^2+8x+15=0
x^2+5x+3x+15=0
x(x+5)+3(x+5)=0
(x+3)(x+5)=0
x=-3 or -5