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Solve for x 9xsquared = 27

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prince0295 | (Level 1) Honors

Posted February 17, 2013 at 3:55 PM via web

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Solve for x

9xsquared = 27

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sciencesolve | Teacher | (Level 3) Educator Emeritus

Posted February 17, 2013 at 4:15 PM (Answer #1)

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You need to divide by 9 both sides, such that:

`9x^2 = 27 => x^2 = 27/9 => x^2 = 3`

You need to take square root both sides, such that:

`sqrt(x^2) = sqrt 3 => |x| = sqrt 3 => x_(1,2) = +-sqrt3`

Hence, evaluating the solutions to the given equation, yields `x_(1,2) = +-sqrt3` .

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