How do you write the equation of a circle given center (-1,-5) and radius 2?

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Answer 1 · 2016-10-26T04:39:19

#(x+1)^2+(y+5)^2=4#

The equation of the circle with center #(h, k)#

#(x-h)^2+(y-k)^2=a^2#

In our problem -

#h=-1#
#k=-5#
#a=2#

Then the equation of the circle is-

#(x-(-1))^2+(y-(-5))^2=2^2#

#(x+1)^2+(y+5)^2=4#

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