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Use suitable identities to find the products of (3x + 2) (3x – 2)

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Use suitable identities to find the products of (3x + 2) (3x – 2)

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(3x + 2) (3x – 2) = (3x)2 – (2)2 

[∵ (x + y) (x – y) =x – y ] 

= 9x2 – 4

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