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8 May, 13:22

Which quadratic evaluation is to (x-4) ^2 - (x-4) - 6 = 0

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  1. 8 May, 15:27
    0
    We need the chocies but I can factor and solve

    subsitute

    u=x-4

    u^2-u-6=0

    what 2 numbers multily to get - 6 and add to get - 1

    -3 and 2

    (u-3) (u+2) = 0

    set to zero

    u-3=0

    u=3

    u+2=0

    u=-2

    but u=x-4

    3=x-4

    7=x

    -2=x-4

    2=x

    x=2,7
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