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27 September, 13:36

Find the value of c that completes the square. x'2+42x+C

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  1. 27 September, 13:59
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    441

    Step-by-step explanation:

    x^2 + 42x + c

    Take the coefficient of x

    42

    Divide by 2

    42/2 = 21

    Square it

    21^2 = 441

    This is the value of c
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