Question

${x}^{2} - 2x = 15$

Answer 1

I hope this will help you

X²-2x-15=0
X²-(5-3)x-15=0

X²-5x+3x-15=0
X(x-5)+3(x-5)=0
(X+3)(x-5)=0
X=-3 or x=5