Question

9(x+a)²-4x² factorise it
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Answer 1

Answer:

$answer$

$9(x + a)^{2} - 4x^{2} \\ 9(x^{2} + 2ax + a ^{2} ) \: 4x^{2} \\ 9x^{2} + 18ax + 9a^{2} - 4x^{2} \\ (9x^{2} + 18ax) + (9a^{2} - 4x^{2}) \\ 9x(x + 2a) + 1(9a^{2} - 4x^{2}) \\ (9x + 1)(x + 2a)(9a^{2} - 4x^{2})$

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