Question

If - 1 is a 0 of the polynomial p (x) =ax cubed - x squared +x+4 find the value of a

Answer 1

heya
x-1=0
x=1
ax^3-x^2+x+4=0
a*1^3-(1)^2+1+4=0
a+1+5=0
a=-(1+5)
a= -6
hope it helps