Y = 3X^2 - 5X + 7
Y = 5
Y´ = 6X - 5
Y = -10X
Y´ = 6X + 5
Y´ = 0
Y´ = 10X
Y = 3X^2 + 5X - 7
Y = X
Y´ = -10
Y´ = 1
Y = 5X^2
