The answer depends on "different from WHAT?" Positive cube roots, or negative square roots?
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The square roots of 4 are -2 and 2.
Yes, a positive square root and a negative one. For example, the two square roots of 9 are +3 and -3.
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.
They are called real numbers. Negative square roots must be complex numbers.
The square roots of any positive real number are a positive and a negative real number. The square roots of any negative real number are a positive and a negative imaginary number. The square roots of any imaginary number or any complex number are two complex numbers.