15
3xy + 3y2 = 3y (x + y)
(3x + 3y)(x + y) = 3(x + y)2
y(3y^2 - 12y + 4)
(3y - 5)(y + 5)
2x2 + 6xy = 2x (x + 3y)
(2x - 1)(6x + 5)
(x - 8)(x - 4)
(2x - 3)(2x - 3)
x2 + 8xy + 15y2 = (x + 3y) (x + 5y)
(3y2)4*3y2*3y2*3y2*3y2 = 38*y16 = 6561y16
0
3y squared - 2y = 1