So y=2x * root (square of 65438 +0-x)

=2* under the radical sign [x 2 (1-x 2)]

≤[x^2+( 1-x^2)]

= 1

So the maximum value (1-x squared) under the root sign of the function y=2x * is 1.

Description: [√ x 2-√ (1-x 2)] 2 ≥ 0.

That is, under the radical sign of x2+(1-x2) ≥ 2 * [x2 (1-x2)].