Question

The graph of
(x2 + y2 − 4x)2 = 2(x2 + y2)
is shown below and
P
is one of the four points on the graph where
x = 1.
Find an equation for the tangent line at P.
I'll post the picture

Answer 1

http://www.webassign.net/waplots/4/4/655c462cd57377b2a426a69f2b79a0.gif

Answer 2

http://www3.wolframalpha.com/Calculate/MSP/MSP50041a41ie35ifabbh4300001e8d1a6bg0g2e1aa?MSPStoreType=image/gif&s=39&w=264&h=47

Answer 3

\[(x^2+y^2-4x)^2=2(x^2+y^2)\]