Question

find the roots -x3 + 5x2 - 11x + 55 = 0

Answer 1

@jim_thompson5910 can you help me?

Answer 2

hint: factor by grouping

Answer 3

im not sure how to do that

Answer 4

-x^3 + 5x^2 - 11x + 55 = 0

(-x^3 + 5x^2) + (-11x + 55) = 0

-x^2(x - 5) -11(x - 5) = 0

I'll let you finish up

Answer 5

you could also use the fundamental theorem of algebra, using long division

Answer 6

okay I factored it then what?

Answer 7

what did you get when you factored?