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18 September, 05:19

What is the solution set of y = x2 2x 7 and y = x 7

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  1. 18 September, 06:46
    0
    Hello,

    y=x²+2x+7

    y=x+7

    ==>x²+2x+7=x+7

    ==>x²+x=0

    ==>x (x+1) = 0

    ==> (x=0 and y=7) or (x=-1 and y=-1+7=6)

    Sol={ (0,7), (-1,6) }
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