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4 October, 18:37

3 times a number is 10 less than the square of that number. Find the negative solution.

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Answers (2)
  1. 4 October, 20:04
    0
    Answer:-2

    Step-by-step explanation: set up an equation

    3x+10=x^2

    x^2-3x-10=0

    what multiplies to get 10 and adds to - 3?

    -5 and 2

    (x-5) (x+2) = 0

    x-5=0 x+2=0

    x=5 x=-2

    The negative solution is - 2
  2. 4 October, 22:24
    0
    -2

    Step-by-step explanation:

    3n = n² - 10

    n² - 3n - 10 = 0

    n² - 5n + 2n - 10 = 0

    n (n - 5) + 2 (n - 5) = 0

    (n - 5) (n + 2) = 0

    n = 5, - 2
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