Question

how would i use the quadratic equation for x^3+17x^2+72x-90 to find the other two zeros after i have already found one

Answer 1

factor it

Answer 2

the question isnt asking me to factor

Answer 3

divide this equation by (x-1)
you will get x^2+18x+90
then factorise it you will get remaining 2 factors

Answer 4

the first zero i got was 1. so i would use -1 right?

Answer 5

no divide your equation by (x-1)
because first zero you got at x=1 so (x-1)=0
after dividing you will get second order eqution solve it you will get the required solution

Answer 6

is that how i would set it up?