Question 760383
Let y = {{{sqrt(49-x^2)}}}, then after squaring both side we have
(1) {{{y^2 = 49 - x^2}}} or
(2) {{{x^2 + y^2 = 7^2}}} which is the equation for a circle centered at the origin (0,0) with a radius of 7.
The roots are at x = {-7,7}
The range is y = (-7,7)
Since it is a circle, I don't think the other attributes apply.