Question

If x+1 is a factor theorem of ax power 3 + x power 2-2x +4a-9, find the value of a??

Answer 1

p(x)=ax^3+x^2+4a-9
g(x)=x+1
        x=-1
p(-1)=a(-1)^3+(-1)^2+4a-9
    0   =-a+1+2+4a-9
    0  =3a-6
    6=3a
    a=2