Y' = (x-10)^2 + (2x^2 - 20x + 2x - 20)
Y' = (x-10)^2 + (2x^2 - 18x - 20)
Y' = x^2 - 20x + 100 + 2x^2 - 18x - 20
Y' = 3x^2 - 38x + 80