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17 March, 07:26

What two numbers multiply to - 105 and add to 8

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  1. 17 March, 10:18
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    A b=-105

    a+b=8

    x²+8x-105=0

    x²+-7x+15x-105=0

    x (x-7) + 15 (x-7) = 0

    (x-7) (x+15) = 0

    a=-7

    b=15
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