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31 January, 07:12

Find the possible value or values of r in the quadratic equation r2 - 7r-8=0

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  1. 31 January, 07:35
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    R^2+r-8r-8=0

    r (r+1) - 8 (r+1) = 0

    (r+1) (r-8) = 0

    r+1=0, r=-1

    r-8=0, r=8

    answer: r=-1 or r=8
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