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# What is meant by square root of any number?

Wiki User

2011-08-03 05:43:53

The square root of a number is the number in which, if multiplied by itself, equals the original number. In other words, if sqrt(x) = y, then y*y = x. If x = 9, then sqrt(9) = 3 (3*3 = 9). The square root of a positive number usually refers to the positive root, so sqrt(9) is generally understood to be 3 instead of -3 (this really depends, though). The square root of a negative number is defined using complex numbers, a generalization of the real number system to two dimensions.

Wiki User

2011-08-03 05:43:53
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