Question

What is the center of a circle whose equation is x2 + y2 + 4x – 8y + 11 = 0?

Answer 1

Answer:

Step-by-step explanation:

eq. of circle is x²+y²+2gx+2fy+c=0

center=(-g,-k)

given eq. is x²+y²+4x-8y+11=0

comparing

2gx=4x

g=2

2fy=-8y

f=-4

center=(-2,4)