Question

Berapakah akar dari x²-x-20 ?

Answer 1

X² - x- 20 =0
(x-5)(x+4)=0
x=5 atau x= -4

Answer 2

X² -X - 20 = 0
(X+4) (X+5)
X1 = X+4 = 0
      = X = -4
X2 = X - 5 = 0
     = x = 5