SOLUTION: write an equation of the line tangent to the given circle at the given point. {{{ x^2+y^2=20 }}} (-4,2)

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: write an equation of the line tangent to the given circle at the given point. {{{ x^2+y^2=20 }}} (-4,2)       Log On


   

Question 624355: write an equation of the line tangent to the given circle at the given point.
+x%5E2%2By%5E2=20+ (-4,2)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

(-4,2)

(0,0) m = 2/-4 Green Line has slope m = -1/2, 

the Line Tangent at (-4,2) would be perpendicular to the Green with m = 2

 y = 2x + b

 2 = -8 + b,  y = 2x + 10