RU-SPB 2015 Problem 111

$x,y$ are real numbers such that $x^2+y^2=1 , 20x^3-15x=3$ Find the value of $|20y^3-15y|$ .(K. Tyshchuk)

Dataset text AI-MO AoPS. Quoted with source.

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.