Square Roots
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You can not find the square root of
-7
the square root of 4
2
Square Root
a value that, when multiplied by itself, gives the number
Principal Square Root
cannot be extended to real negative numbers since the two square roots of a negative number cannot be distinguished until one of the two is defined as the imaginary unit, at which point and can then be distinguished.
You can only find the square root of
positive numbers
You always find the
square root first, then solve the rest of the problem.
Perfect Square
the product of a rational number multiplied by itself