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1 January, 20:11

When factoring completely the expression p^4-81 isequivalant to

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  1. 1 January, 20:39
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    We have the formula: a^2 - b^2 = (a-b) (a+b);

    p^4 - 81 = (p^2) ^2 - 9^2 = (p^2 - 9) (p^2 + 9) = (p - 3) (p + 3) (p^2 + 9);
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