Question

X+1 and x+2 are factors of x^3+3x^2-2ax+b

Answer 1

since these are factors therefore they will satisfy the eqn
put x=-1 and x=-2 in eqn
-1+3-2a(-1)+b=0
-8+12+4a+b=0
just solve these 2

Answer 2

Solution for this question