Question

Factorise : x to the power 4 - 16y to the power 4

Answer 1

Answer:

x⁴-16y⁴

= (x²)²-(4y²)²

= (x²+4y²)(x²-4y²)

= (x²+4y²){(x)²-(2y)²}

= (x²+4y²)(x+2y)(x-2y)

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Answer 2

a2-b2=(a+b)a2-b2=(a+b)(a-b) where a=X2 and b=4y2b=4y2