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2 October, 03:10

What substitution should be used to rewrite 6 (x + 5) 2 + 5 (x + 5) - 4 = 0 as a quadratic equation?

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Answers (2)
  1. 2 October, 03:46
    0
    (6 + 5) (x + 5) - 4 = 0
  2. 2 October, 04:25
    0
    Step-by-step explanation:

    put x+5=t

    6t²+5t-4=0

    solve for t and then find x

    6t²+8t-3t-4=0

    2t (3t+4) - 1 (3t+4) = 0

    (3t+4) (2t-1) = 0

    t=-4/3,1/2

    x+5=-4/3

    x=-4/3-5=-19/3

    or x+5=1/2

    x=1/2-5=-9/2
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