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4 September, 05:49

Solve 2x^2 = 72.

Question 1 options:

{±18}

{±36}

{±6}

{±8}

+1
Answers (2)
  1. 4 September, 06:48
    0
    All you do is have to plug each option in for x

    2*18^2=684

    2*36^2=2592

    2*6^2=72

    2*8^2=128

    So it's C. 6
  2. 4 September, 09:43
    0
    You divide both sides by 2 to get X^2=36. You then square root both sides to get X=6. The answer is d. 6.
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