256 has two square roots: 16 and -16.
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There are no real square roots of -256. But using complex numbers the square roots of -256 are 16i and -16i.
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.
Answer: 256 ft² = 23.7831 m²
162 = 256
square inches do not have square roots only number have square roots.