Answer:
x=−1 ,1,−2
Step-by-step explanation:
x3+2x2−x=2
x3+2x2−x−2=2−2
x3+2x2−x−2=0
(x+1)(x−1)(x+2)=0
x+1=0 or x−1=0 or x+2=0
x=−1 or x=1 or x=−2
