Помогите срочно 3(3,4)

3) 4у^3+8y^2-y=2 y(4y+8)^2-y=2 4y+8-y=2 3y=-4 y=-3/4 4) 12x^2-8x^3+2x = 3 x(12-8x)^2+2x = 3 -6=-6 x= -1