Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
x2 + y2 = 2r2
7
(2x)ysquared
(2-r)e-rr
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
x2 + y2 = 2r2
9
7
(2x)ysquared
8
(2-r)e-rr
is a quadratic equation for y, in terms of x.
The discriminant is -11.
2 this Domo
x2+11x+11 = 7x+9 x2+11x-7x+11-9 = 0 x2+4x+2 = 0 The above quadratic equation can be solved by using the quadratic equation formula and it will have two solutions.
Equation of a circle centre the origin is: x2 + y2 = radius2 ⇒ radius = √9 = 3.