Calculus  Tangent Line
posted by Andrew .
Hi, im having problems with the following problem. The main issue is actually starting the problem.
Find the two points on the curve y = x^4  2x^2  x that have a common tangent line.
First, find the derivative of y(x) so that you know the slope of the tangent line at any given x.
The derivative will be a quadratic formula for which there may be two solutions.
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