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Find the equation of the circle with centre (-3,4) and passing through the origin. 

 Oct 19, 2018
 #1
avatar+94321 
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The  radius  =   sqrt [ (0 +3)^2  + ( 0 - 4)^2 ] = sqrt [ 9 + 16 ] = sqrt (25)  = 5

 

So...the equation becomes

 

(x + 3)^2 + ( y - 4)^2  =  5^2

 

(x + 3)^2 + ( y - 4)^2  =  25

 

 

cool cool cool

 Oct 20, 2018

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