Find the values of a,b,c where the curves y=x^2+ax+b and y=cx+x^2 have a common tangent line at (-1,0)
*so far i found the derivatives of both equations then set them equal to each other but idk what to do after i set them equal to ea. other

Question

Find the values of a,b,c where the curves y=x^2+ax+b and y=cx+x^2 have a common tangent line at (-1,0)
*so far i found the derivatives of both equations then set them equal to each other but idk what to do after i set them equal to ea. other

anonymous · Answer

http://answers.yahoo.com/question/index?qid=20091015065538AAezxtI

alexwee123 · Answer

thx

anonymous · Answer

Thank you for the medal.
I got {a = -1, b = 0, c = -1}
The two curves are identical.
A plot is attached.