Thực hiện phép tính: y^2. (5/7y^3 - 2y^2 + 0,25) =
Giải thích
y2. \(\left( {\frac{5}{7}{{\rm{y}}^3} - 2{{\rm{y}}^2} + 0,25} \right)\) = y2.\(\frac{5}{7}\)y3 – y2.2y2 + y2.0,25 = \(\frac{5}{7}\)y5 – 2y4 + \(\frac{1}{4}\)y2
y2. \(\left( {\frac{5}{7}{{\rm{y}}^3} - 2{{\rm{y}}^2} + 0,25} \right)\) = y2.\(\frac{5}{7}\)y3 – y2.2y2 + y2.0,25 = \(\frac{5}{7}\)y5 – 2y4 + \(\frac{1}{4}\)y2