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2 April, 01:57

Why cant 81-x to the forth power be factored unti (3+x) squared times (3-x) squared

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  1. 2 April, 04:21
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    Below.

    Step-by-step explanation:

    81 - x^4 Treat as the difference of 2 squares:

    = (9 - x^2) (9 + x^2)

    We can further factor the 9 - x^2 (difference of 2 squares)

    = (3 - x) (3 + x) (9 + x^2).

    9 + x^2 can't be factored.
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