Is sqt.x2 an identity true for all non negative values of x?

Answer 1

Yes. For all x >= 0, sqrt(x^2) = x.

For any real number x, nonnegative or negative, you have this identity:

sqrt(x^2) = |x|.

Answer 2

sure! --- besides the reality that the simplified equation is x, we could desire to consistently not forget the genuine equation. In finding out on all a threat values of x, we glance at the unique equation and not the simplified ones. for the reason which you are able to never have detrimental values interior the squareRoot image(except you opt to yield imaginary numbers), x could desire to consistently be a exceptional form(0 secure), subsequently {X|X>=0}