Question

y^4 + 4y^2–32 factorise it
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Answer 1

Answer:

let y^2be a

=a^2+4a-32

=a^2+8a-4a-32

=a(a+8)-4(a-8)

=(a-4)(a-8)

put a=y^2

=(y^2-4)(y^2-8)

hope it helps u..

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