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14 June, 12:21

3 (2x^2+5) - 12 for x is 3

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  1. 14 June, 12:48
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    3 (2x^2+5) - 12

    3 (2x^2) = 6x^2

    3 (5) = 15

    6x^2+15-12

    6x^2+3

    Plug in the x

    6 (3) ^2+3

    Exponent first so 3^2 is 9

    6 (9) + 3

    54+3

    57 is the answer.
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