Question

How do I factor this fourth degree polynomial, x^3+9x^2-9x-81?

Answer 1

take x^2 in common among x^3+9x^2 and -9in common among -9x-81

Answer 2

Actually this is a third degree polynomial.

Answer 3

x^2(x+9)-9(x+9)

Answer 4

yeah u r correct

Answer 5

cool thanks

Answer 6

proceed further

Answer 7

I don't know what to do next

Answer 8

@Kainui whatever

Answer 9

take (x+9) common...

Answer 10

x^2-9(x+9)^2

Answer 11

not sure what to do here

Answer 12

x^2(x+9)-9(x+9) = (x+9) (x^2 - 9)

Answer 13

oh ok

Answer 14

and that's it right?

Answer 15

yup

Answer 16

thank you

Answer 17

it was wrong

Answer 18

@MikeB55 it cant be wrong man....solve (x + 9)*(x^2 - 9)

Answer 19

Just the form they wanted was off I guess. It was (x+9)(x+3)(x+3)

Answer 20

oh yeah..and its (x+3)(x-3)(x+9)