Find (dy)/(dx) by implicit differentiation. x³ + y³ + 3y - 3 = 0. (dy)/(dx) =
a) -3x² / (3y² + 3)
b) -3x² / (3y² - 3)
c) 3x² / (3y² + 3)
d) 3x² / (3y² - 3)