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2014-12-29T13:30:29+08:00

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Well, for your question mister, there are 2 answers: they are 7 and -7 Check: 7 x 7 = 49, CORRECT! -7 x -7 = 49, CORRECT! But, if the question asks about the principal square root, the answer should only be the positive square root if I am not mistaken.
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2014-12-29T19:40:54+08:00
Sqroot of 49 is +7,-7  because 7x7=49
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