Is this a mistake on my part or theirs?I'm not sure if I'm the one making the mistake, or my math book. It looks like the negative sign completely disappeared. 3 x 2 − 18 ⋅ 2 2 = 3 x 2 2 − 36 = 3 x 2 2 6 = x 2 2 2 Also, I am new to Stackexchange, so tell me if I am doing something wrong.

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Is this a mistake on my part or theirs?I&#039;m not sure if I&#039;m the one making the mistake, or my math book. It looks like the negative sign completely disappeared.            3              x        2                    −              18              ⋅            2              2        =            3              x        2                    2                    −              36              =            3              x        2                    2              6    =                    x        2                    2              2  Also, I am new to Stackexchange, so tell me if I am doing something wrong.

vishaex0 · Accepted Answer

Be cautious about the negative sign,            3              x                  2                            −              18              ×            2              2        =  −            3              x                  2                            18        ×            2              2        =  −            3              x                  2                            3              2              =  −            x              2                    2      Maybe, there is a typo in the textbook.

Antoine Hill · Accepted Answer

It&#039;s probably them. It starts out correct, but when they go to take the negative square root of 36, there was an error. The correct approach is (or should I say, should be):            3              x        2                    −              18              ⋅            2              2        =            3              x        2                    2                    −              36              =            3              x        2                    2                    −      6        =  −                    x        2                    2              2  This is because   −      36   is actually   −  (      36    ). Or you could just apply the fraction rule and make it negative and go from there. It&#039;ll still give you the same answer.

Is this a mistake on my part or theirs? I'm not sure if I'm the one making the mistake, or my math

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