Use suitable identity to find the product: (3-2 x)(3+2 x) - Vidyadip

Question

Use suitable identity to find the product: $(3-2 x)(3+2 x)$

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Answer

$(3-2 x)(3+2 x)=(3)^2-(2 x)^2$
$\left\{\right.$ Using Identity $\left.a^2-b^2=(a-b)(a+b)\right\}$
$=9-4 x^2$

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