factor the polynomial:

Question

30x (squared) + 10x - 20

 

what adds up to get 10, but also multiplies to get -600?

Answer 1

I did not see the factors right away...so I solved the equation by the quadratic formula to get x=2/3 and x=-1

You get the 2/3 root from (30x-20), so the factors are (30x-20)(x+1)