Question

4x^4 11x ^2+9 factorise

Answer 1

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Answer 2

I think you missed the + sign

So i'm going to factor $4x^4+11x^2+9$

$4x^4+11x^2+9$

$=4x^4+12x^2-x^2+9$

$=4x^4+12x^2+9-x^2$

$=(2x^2+3)^2-x^2$ (using formula a^2-b^2=(a+b)(a-b)

$=(2x^2+3-x)(2x^2+3+x)$

Hence final answer is $(2x^2+3-x)(2x^2+3+x)$.