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19 August, 09:50

Solve for x.

8x^2 - 5 = 11

+2
Answers (2)
  1. 19 August, 09:57
    0
    x = ±sqrt (2)

    Step-by-step explanation:

    8x^2 - 5 = 11

    Add 5 to each side

    8x^2 - 5+5 = 11+5

    8x^2 = 16

    Divide each side by 8

    8x^2 = 16/8

    x^2 = 2

    Take the square root of each side

    sqrt (x^2) = ±sqrt (2)

    x = ±sqrt (2)
  2. 19 August, 10:18
    0
    X = 1

    8x^2 turns to 16x

    Add five on each side of the equation, totaling 16.

    16x = 16

    x = 1
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