Question

Write the equation of the circle graphed below.

Answer 1

Answer:

The general form of cirle is

x²+y²+2gx+2fy+c=0

Hete(-g,-f) is center

Given (-1,1) is a centre

Radius=

$\sqrt{g { \: }^{2} + f {}^{2} - c }$

From figure we find out radius as square root of 74

1+1-c = 74

C=-72

Eq of circle is x²+y2-2x+2y-72=0