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10 December, 17:56

when 5 is subtracted from the square of a number, the results is 4 times the number. find the negative solution

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Answers (2)
  1. 10 December, 18:03
    0
    Answer:x=-1

    Step-by-step explanation:

    To find this

    We assume the number is x

    The square of the number=x^2

    Therefore when 5 is subtracted from the number we get

    x^2-5=4 * the number x

    x^2-5=4x

    X^2-4x-5

    To factorise

    x^2-5x+x-5

    (x^2-5x) + (x-5)

    x (x-5) + 1 (x-5) = 0

    (x+1) (x-5) = 0

    To find the negative solution

    (x+1) = 0or (x-5) = 0

    x=-1
  2. 10 December, 18:11
    0
    Step-by-step explanation

    5 is subtracted from the square of a number

    The square of a number is x with an exponent as 2

    5 is then subtracted from the x with an exponent of 2

    X^2 - 5 is your answer
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