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find the equation if the center (-4,3),tangent to the line y=-4x-30

 Jun 29, 2017
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find the equation if the center (-4,3),tangent to the line y=-4x-30

 

First use the perpendicular formula to find the radius  r

 

then

 

\((x+4)^2+(y-3)^2=r^2\)

.
 Jun 29, 2017

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