Question

x3+2x2-x-2 cubic equation​

Answer 1

Answer:

x=1

Step-by-step explanation:

x^3+2x^2-x-2=0

x^3+2x^2-x=2

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

or(x=1,x=2)

x=1    1(1^2+2*1-1)=2 yes

x=2    2(2^2+2*2-1)=14 no