Question

If (x - 2)(x + 1) = 0, then x =​

Answer 1

Answer:

x=2 or x=-1....................

......but since the product is 0. one of the multiplier must be 0. or both of them can be zero.

Answer 2

Answer:

(x-2)(x+1)=0

x(x+1)-2(x+1)=0

x^2+x-2x-2=0

x^2-x-2=0

x^2-2=x

x=x^2-x