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9 October, 13:42

Katie solved the equation by completing the square x^2+12x-7=0 which equation shows one of the steps Katie could have taken to complete the square

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  1. 9 October, 14:45
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    x^2+12x-7-6^2+6^2=0

    (x+6) ^2-7-36=0

    (x+6) ^2-43=0

    x = - 6 Plus or minus root 43
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