Saverysoulviz
Answered

1. Find the factor x^3+2x^2-x-2.
x+2
x-3
x+3
x-2

Sagot :

first problem

Factor by grouping

(x³ + 2x²) - (x - 2) 
the sign will change
(x³+2x²) - (x+2)
factor again
x²(x+2)- (x+2)

(x²-1) (x+2)

difference of two squares

(x+1)(x-1)(x+2) 

:)