Question

factorise 9x^2-16y^2​

Answer 1

$(3x + 4y)(3x - 4y)$

as a^2-b^2=(a+b)(a-b)

Answer 2

Hello !

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• 9x^2 - 16y^2

• (3x)^2 - (4y)^2

Now a^2 - b^2 = ( a + b ) ( a - b)

So answer = ( 3x + 4y ) ( 3x - 4y )

Thanks :)

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