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20 October, 07:07

Use FOIL to derive the identify for (a+b) ^2.

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  1. 20 October, 07:16
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    a^2+2ab+b^2

    Step-by-step explanation:

    FOIL method is First variables Outer variables Inner variables Last variables

    (a+b) ^2 rewritten is (a+b) (a+b)

    F - a*a

    O - a*b

    I - a*b

    L - b*b

    a*a+a*b+a*b+b*b

    simplify

    a^2+2ab+b^2
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