Use suitable identities to find the following product: (3 – 2x) (3 + 2x)

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Solution

Using identity, (x + y) (x – y) = $x^{2}$ – $y^{2}$
(3 - 2x)(3 + 2x) = ${(3)}^{2}$ – ${(2 x)}^{2}$ = 9 - ${4 x}^{2}$

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