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7 July, 07:27

Complete the equation so that it has solutions of - 5 and 7

x2 + __ x + __ = 0

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Answers (2)
  1. 7 July, 07:31
    0
    -2,-35 just use the formula they give you
  2. 7 July, 07:34
    0
    It the solutions are r1 and r2, then it factors to

    (x-r1) (x-r2)

    so solutions are - 5 and 7

    r1=-5

    r2=7

    (x - (-5)) (x-7) = 0

    (x+5) (x-7) = 0

    x²+5x-7x-35=0

    x²-2x-35=0

    first blank is - 2, 2nd is - 35
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