Factorise:

Question:

Factorise:
4x2 − 9y2

Solution:

We have:

$4 x^{2}-9 y^{2}=(2 x)^{2}-(3 y)^{2}$

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

$\therefore 4 x^{2}-9 y^{2}=(2 x+3 y)(2 x-3 y)$

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