Thực hiện phép tính: \(\eqalign{& a)\;3xyz\left( {2{x^2} – 3y – 3} \right) \cr & c)\;{\left( {x + 3} \right)^2} + {\left( {x – 3} \right)^2} – 2\left( {x + 3} \right)\left( {x – 3} \right) + xy \cr} \) \(\eqalign{ & b)\;\left( {6{x^4} – 3{x^3} + {x^2}} \right):\left( {{x^2}} \right) \cr & d)\;\left( {3{x^4} + 4{x^3} – 2{x^2} + x + 1} \right):\left( {x + 1} \right) \cr} \)
by Thực hiện phép tính: \(\eqalign{& a)\;3xyz\left( {2{x^2} – 3y – 3} \right) \cr & c)\;{\left( {x + 3} \right)^2} + {\left( {x – 3} \right)^2} …