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11 February, 10:18

Solve the equation using square roots. x^2 - 9 = 0

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  1. 11 February, 10:24
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    First, we need to get the X variable by itself. To do this, we need to add 9 to both sides.

    X^2 - 9 = 0

    X^2 - 9 + 9 = 0 + 9

    X^2 = 9

    Now, we need to take the square root of both sides.

    √ (X^2) = √9

    The square root of any squared number is the number itself. Thus:

    √ (X^2) = + / - √9

    X = + / - √9

    X = + / - 3

    Thus:

    X = 3 and X = - 3
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