Can you factor x^4 - 13x^2+ 36 ? If so what would it be?

Answer 1

Try this method:

let u = x^2

The new expression (in terms of u) is: u^2 - 13u + 36 = 0
factoring the above expression, you get:
(u-9)(u-4) = 0

recall u = x^2, so

(x^2-9)(x^2-4) = 0
(x+3)(x-3)(x+2)(x-2) = 0

Good luck.

Answer 2

if i am correct this is what you get

x^4 - 13x^2+ 36
x^2( x^2-13+36)
X^2(x^2+23)

that is as far as you can go

Answer 3

(x-3)(x-2)(x+2)(x+3)

Answer 4

use the quad equation it should be easy