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2 October, 06:09

Solve for x. 3x ^2 - 4 = 8

+4
Answers (2)
  1. 2 October, 06:52
    0
    x = ±2

    Step-by-step explanation:

    3x ^2 - 4 = 8

    Add 4 to each side

    3x ^2 - 4+4 = 8+4

    3x^2 = 12

    Divide each side by 3

    3x^2 = 12

    3x^2/3 = 12/3

    x^2 = 4

    Take the square root of each side

    sqrt (x^2) = ±sqrt (4)

    x = ±2
  2. 2 October, 09:46
    0
    x = 2

    Step-by-step explanation:

    3x ^2 - 4 = 8

    +4

    3x^2 = 12

    3x^2/3 = 12/3

    x^2 = 4

    Square root 4 is 2

    x = 2
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