√(16/81) = (√16)/(√81) = 4/9
→ The two roots are 4/9 and -4/9
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256 has two square roots: 16 and -16.
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.
16*sqrt(3) * 4*sqrt(2) = 16*4*sqrt(3)*sqrt(2) = 64*sqrt(6)
There are no real square roots of -256. But using complex numbers the square roots of -256 are 16i and -16i.
x=16