Kinda stuck (1 Viewer)

[Speed6]

How would I start to factorise this question? It's just not ticking in my head.

 

[enigma_1]

Let u = x^2

Then you get 4u^2 -13u +9

You can factorise this using the quadratic formula:
u=9/4 and 1

:. (4u-9)(u-1)
now sub back in the u = x^2

and you get (4x^2 -9)(x^2 -1)

you can factorise this further using the difference of 2 squares for both of the above brackets

=(2x - 3)(2x+3)(x-1)(x+1)

 

[SilentWaters]

 

[Speed6]

Both of 'u' are correct.

See what I did there?