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16 May, 17:50

The quadratic equation x^2 - 8x = - 4 is rewritten in the form (x + p) ^2 = q. when q is a constant. What is the value of p?

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  1. 16 May, 21:47
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    -4

    Step-by-step explanation:

    If you multiply out the square, you can see ...

    (x + p) ^2 = q

    x^2 + 2px + p^2 = q

    The coefficient of the x-term is 2p, so ...

    2p = - 8

    p = - 8/2 = - 4
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