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31 October, 06:14

If 4x^2 - 100 = 0 then the roots of the equation are

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Answers (2)
  1. 31 October, 06:19
    0
    4x^2-100=0

    4x^2=100

    x^2=100/4

    x^2=-25

    x=5 or x=-5
  2. 31 October, 06:25
    0
    4x² - 100 = 0

    + 100 + 100

    4x² = 100

    4 4

    x² = 25

    x = + 5

    4 (5) ² - 100 = 0

    4 (25) - 100 = 0

    100 - 100 = 0

    0 = 0

    4 (-5) ² - 100 = 0

    4 (25) - 100 = 0

    100 - 100 = 0

    0 = 0

    The roots of the equation is positive or negative 5.
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