Question

i need help! whatsx4+8x3+7x2-40x-60=0

Answer 1

let me guess, you're trying to factor it?

Answer 2

yes i need to find the rational roots, but i dont know how to :/

Answer 3

we have -60 as the last term so possible rational roots are +/- 2, +/- 6 , +/- 4 for instance - by rational root theorem
try calculating f(2) and f(-2)

Answer 4

Ok ill try thanks :)

Answer 5

you'll find that f(-2) = 0
so -2 is one rational root

Answer 6

alright thsnks i got the full answer

Answer 7

good -6 is another root