Question

How can solve this . (X-2)(x+4)

Answer 1

To expand
X times X = X^2
-2 times X = -2X ( add this to 4X to equal 2X)
4 times X = 4X
-2 times 4 = -8

X^2 + 2X -8

To solve when equation = 0

X = +2 or -4

Answer 2

Inmultesti pe rand cu fiecare : x*x+x*4-2*x-2*4=x²+4x-2x-8=x²+2x-8