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12 October, 06:10

Finn checks that (x-1) (x+3) = x2+2x-3 by multiplying and gets x2-x+3x-3. He believes he must have made a multiplication error. Is he correct? Explain.

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  1. 12 October, 06:30
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    No multiplication error. He is still correct. He should solve for the like terms (-x+3x) = 2x

    Step-by-step explanation:

    Given the expression as;

    (x-1) (x+3)

    Distribute as;

    x (x+3) - 1 (x+3)

    open brackets

    x*x+x*3-1*x-1*3

    x²+3x-x-3

    x²+2x-3
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