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15 January, 12:58

If a = b + 2, then (b - a) ⁴ = ?

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  1. 15 January, 16:31
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    Use substitution.

    anywhere you see "a", than you would plug in b + 2 in for it so ...

    (b - (b + 2) ^4

    now take the negative sign and distribute it "+"

    so b - b is 0, than 0 - (-2) is - 2.

    so what is (-2) ^4? it would become positive 16
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