Question

Factorize 9x^2 - 4y^2

Answer 1

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$9x {}^{2} - 4y {}^{2} \\ = we \: can \: write \: this \: \: like \: \\ = (3x) {}^{2} - (2y) {}^{2} \\ = by \: using \: identity \\ = x {}^{2} - y {}^{2} = (x + y)(x - y) \\ so \\ \\ (3x + 2y)(3x - 2y)$

Answer 2

Answer:

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

Step-by-step explanation:

$9x^{2}-4y^{2}$

Applying the identity ⇒ $a^{2}-b^{2}=(a+b)(a-b)$

$(3x)^{2}-(2y)^{2}\\(3x-2y)(3x+2y)$

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