kill(all)$

/Users/van/Desktop/Screen Shot 2018-11-03 at 8.00.00 PM.png

/Users/van/Dropbox/public_html/Math/Facebook/vanSecondTangentProblem.png

/Users/van/Dropbox/public_html/Math/Facebook/vanSecondTangentProblem.png

van=facebook.com/LearningCalculus$

f(x):=x^3-%pi*x;

solve(f(x),x);

           Let C: y = x*(x-sqrt(pi))*(x+sqrt(pi))
           Find all tangent lines of C which pass through (sqrt(pi),0)

y = (x-sqrt(pi))*x*(x+sqrt(pi));

expand(%);