1 x 256, 2 x 128, 4 x 64, 8 x 32, 16 x 16
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A positive number has two square roots, its principal (positive) root and its negative root. This is because a negative number multiplied by a negative number equals a positive number. In this instance, the square roots of 256 are 16 and -16.
There are two, 0 and 1.
50
5 or -6
2 and 4 multiplied equals eight.