If $x^{2} = 9$ $x^2=9$ , then what is the value of x?

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Answer 1 · 2016-11-01T18:46:47

$x = + 3, x = - 3$ $x = +3, x = -3$

In $x^{2} = 9$ $x^2 =9$ , you need to get rid of the power of 2 in order to isolate just $x$ $x$

This involves finding the square root. ${\sqrt{x}}^{2} = x$ $sqrtx^2 = x$

However there are 2 possible answers to a square root, a positive or a negative answer.

$x = \pm \sqrt{9}$ $x = +-sqrt9$

$x = \pm 3$ $x = +-3$

If x2=9x^2=9, then what is the value of x?