If a is any number, then a squared = (-a) squared, so one might say that a and -a are both square roots of a squared. However, the square root symbol always means the positive square root.
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345 is not a perfect square and neither is its square root.
Any integer is a perfect square oot (of its square). So 300 is a perfect square root of 90000.
The square root of negative 40 is: 6.324555 i
Yes, a perfect square is a number that has an integer square root.
The idea is to take out perfect squares. The largest perfect square in this case is 256, which is the square of 16 (if you have trouble figuring this out, you can take out a smaller perfect square first, and then see if you find additional perfect squares). In any case, the end result should not have a factor that is a perfect square. Using the symbol "root()" for square root: root(512) = root(256 x 2) = root(256) x root(2) = 16 root(2)