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6 August, 01:06

4x2 - 1 = 15

find the justification

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Answers (1)
  1. 6 August, 03:54
    0
    see below

    Step-by-step explanation:

    4x^2 - 1 = 15

    Add 1 to each side using the addition property of equality

    4x^2 - 1+1 = 15+1

    4x^2 = 16

    Divide each side by 4 using the division property of equality

    4x^2/4 = 16/4

    x^2 = 4

    Take the square root of each side

    sqrt (x^2) = ±sqrt (4) property of square roots

    x = ±2
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