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29 October, 16:52

Find the product of (2a + 3b) (2a + 3b) using identities

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  1. 29 October, 20:25
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    4a^2 + 12ab + 9b^2.

    Step-by-step explanation:

    Use the identity (a + b) (a + b) = a^2 + 2ab + b^2:

    So

    (2a + 3b) (2a + 3b)

    = (2a) ^2 + 2 * (2a) (3b) + (3b) ^2

    = 4a^2 + 12ab + 9b^2.
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