Question

PLZ HELP ASAP FEATURES OF A CRICLE FROM AN EXPANDED EQUATION

Answer 1

First we need to convert the given equation to standard form.

$x^{2} + y^{2} -2y-99=0 \\ \\ x^{2} + y^{2}-2(y)(1)=99 \\ \\ x^{2} + y^{2}-2(y)(1)+1=99+1 \\ \\ x^{2} + (y-1)^{2}=100$

Comparing this equation to the standard equation of circle, we can write:

The center of the circle is (0, 1) and the radius of the given circle is 10