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1 October, 19:36

What is the product of (x-1) (x+1)

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  1. 1 October, 20:23
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    Use foil method, (must know; (a²-b²) = (a-b) (a+b))

    (x-1) (x+1)

    x²+1x-1x-1

    x²-1

    Hence, the final answer is x²-1
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