Question

x2 - x - 156. please answer this question

Answer 1

x^2 - x -156
= x^2 - 13x + 12x -156
= x(x-13) + 12(x-13)
= (x+12)(x-13)
(x+12)=0 and (x-13)=0
x = -12 and x =13

hope it helps you..

Answer 2

X2-x-156
2x=156
_
2
X=78
_
2
X= 39