E maths - algebra

some simple equations here, but i have no idea how to factorise them.

9x^4 + 17 x^2 - 2

please help. thanks!

hihi, the solution is :

use factorisation method..

9x^4 + 17x^2 - 2 = (9x^2-1)(4x^2+2)

=(9x^2-1)(x^2+2)

=2(2x^2+1)[(3x)^2-1^2]

hope it helps ! =D

9x^4 + 17x^2 - 2
(9x^2-1)(x^2+2)
(3x+1)(3x-1)(x^2+2)