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27 September, 09:55

Simplify fully: (2x+3) ^2 - (2x-3) ^2

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  1. 27 September, 12:40
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    (2x+3) ^2 - (2x-3) ^2 = (2x+3) * (2x+3) - (2x-3) * (2x-3) = (4x^2+12x+9) - (4x^2-12x+9) = 4x^2+12x+9-4x^2+12x-9=24x

    So the answer is 24x
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