when and
this right?
One might say that the evaluation has two answers, but this would be incorrect.
While one solves "x^2 = 4" for the two solution values, -2 and +2, "the" value of the square root of 4, sqrt[4], is defined to be the principal (that is, the positive real) value: sqrt[4] = 2.
So no, there will most definitely not be two answers to this one evaluation exercise!
. . .
And the above is the only answer!