1, 2/x-1 + 4/x+3=3x+11/x^2-2x+3
2, 7/x+2 + 2/x+3=1/x^2-2x+3
3, x/x+2 - x^2+1/x^2-2x+8=3/x-4
4, 3/x+1 + 2/x+2=5x+4/x^2+3x+2
5, 9/3x-1 - 5-x/3x^2-4x+1=4/x-1
6, 2/x^2+3x+2 + 1/x^2+5x+6=1/x^2-3x+2
7, x/x^2-1 + 3/x^2-2x-3=x/x^2-4x+3
Loga
Sinh Học lớp 12
