description: sqrt ket square root the coefficients return x^(1/2) examples: sqrt (9|x> + 25|y> + 49|z>) 3|x> + 5|y> + 7|z> sqrt square (0.2|x> + 3|y> - 5|z>) 0.2|x> + 3|y> + 5|z> see also: square, abs