Question

4 a square -9 b square​

Answer 1

Answer:

$4a {}^{2} - 9b {}^{2} \\ (2a) {}^{2} - (3 b) {}^{2} \\ (2a - 3b)(2a + 3b) \\ using \: identity \: \: \: x {}^{2} - y {}^{2} = (x + y)(x - y)$

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Answer 2

Answer:

$= 4a {}^{2} -9b {}^{2} \\ =( 2a) {}^{2} - (3b) {}^{2} \\ = (2a + 3b)(2a - 3b)$

Step-by-step explanation:

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