3 posts
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)
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