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15 November, 19:59

Find the zero of y=x^2-6x-4 by completing the square

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  1. 15 November, 22:04
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    x = 3 + √13, 3 - √13 or

    6.61, - 0.61 to the nearest hundredth.

    Step-by-step explanation:

    y = x^2 - 6x - 4

    x^2 - 6x - 4 = 0

    (x - 3) ^2 - 9 - 4 = 0

    (x - 3) ^2 = 13

    x - 3 = + / - √13

    x = 3 + √13, 3 - √13.
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