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2 February, 03:41

Solve 3x^2-27=0 using square roots

+3
Answers (2)
  1. 2 February, 04:13
    0
    3x^2-27=0

    3x^2 = 27

    x^2 = 9

    x^2 = + - 3
  2. 2 February, 07:21
    0
    3x^2-27=0

    3 (x^2-9) = 0 notice the difference of squares in the parentheses ...

    3 (x+3) (x-3) = 0

    so x=±3 which means x=-3 or 3
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