\((y + \ldots)^3 = y^3 + \ldots + \frac{3}{4}y + \ldots\)

----- Nội dung ảnh -----
c) \((y + \ldots)^3 = y^3 + \ldots + \frac{3}{4}y + \ldots\);

d) \((\ldots - 2z)^3 = 1 - 6z + \ldots - \ldots\).

Lời giải.