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What is square root? Definition of square root A square root of a number 'x' is a number y such that y2 = x, in other words, a number y whose square is y. For example, 11 is the square root of 121 because 112 = 11•11 = 121, -11 is square root of 121 because (-11)2 = (-11)•(-11) = 121. When writing math, people often use sqrt(x) to mean the square root of x. Read more about square root here: Square Root - Wikipedia and here: Square Root - Wolfram (责任编辑:) |
