Question

find roots of x^3+2x^2-5x-6?

Answer 1

By inspection try to find one root first

Answer 2

i would first test if +1 and -1 are roots are not

Answer 3

test +1

1+2-5-6

reject

Answer 4

test -1
-1 + 2 +5 -6

-7+7

0

Yes, -1 is a root

Answer 5

since -1 is a root, (x+1) is a factor of given polynomial

Answer 6

divide it, and you wud get a quadratic which is easy to solve

Answer 7

with amount of technology around, i suggest you just graph the function using calculator of software and check for any rational roots to factor out

Answer 8

i used both methods. thank you very much. so helpful!