because you can get a positive number as EITHER a product of 2 positive numbers OR the product of the negatives of the SAME 2 numbers; the product of 2 negative numbers is positive.
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The numbers 1 and negative 1 (-1) are both square roots of positive 1.The square root of negative 1 is the "imaginary" number i.
An integer has both positive and negative numbers.
Every positive number has two square roots. Their absolute values are the same. One is positive and the other is negative.
Because multiplying negative numbers together gives a positive answer. So the square root of nine is both three and minus three.
4 x -6 = -24 A good way to remember how to do this is to multiply the two numbers as you would if they were both positive. Then, if only one of the numbers is a negative, the answer will be a negative. If both numbers are a negative, the answer will be a positive.