B) X2 – XY + 2X – 2Y = (X2 – XY) + (2X – 2Y) 0.25 ĐI MỂ(1...
Câu 2 b) x
2
– xy + 2x – 2y = (x2
– xy) + (2x – 2y) 0.25 đi mể(1 đi m)ể = x(x – y) + 2(x – y) = (x – y) (x + 2)0.25 đi mể 2x3
+17x2
– 4x – 60 x + 2 2x3
+ 4x2
2x2
+ 13 x – 30