Question

factorise the following 4 (a+b)2 - 9 (a-b)2​

Answer 1

Answer:

$4(x + y)^{2} - 9 {(x - y)}^{2} \\ \implies \: {(2(x + y))}^{2} - {(3(x - y))}^{2} \\ \implies \: (2(x + y) + 3(x - y))(2(x + y) - 3(x - y)) \\ \implies \: (5x - y)(y - x)$

Answer 2

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