calculus
posted by anonymous .
The line x=c where c>0 intersects the cubic y=2x^(3)+3x^(2)9 at point P and the parabola y=4x^(2)+4x+5 at point Q.
a. If a line tangent to the cubic at point P is parallel to the line tangent to the parabola at point Q, find the value of c where c>0.
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