Question

if -1 is a zero of the polynomial p(x)= ax^3-x²+x+4, then find the value of a

Answer 1

Answer:

(x)= ax^3-x²+x+4

-1=x

(-1)=a(-1)^3-(-1)^2+(-1)+4

-1=-a-1-1+4

-1=-a+2

-1-2=-a

-3=-a

hence,

a=3