A/ X3 –X2 +1 B/ X3+X-1 C/ X3 –X2 –X+1 D/ X3-X+180 3 125X X3( 3) ( 3)(8 4 )X X X   

Question

Câu 3 : Rút gọn phân thức :  bằng :a/ x3 –x2 +1 b/ x3+x-1 c/ x3 –x2 –x+1 d/ x3-x+180 3 125x x3( 3) ( 3)(8 4 )x x x   

Answer

a/ x 3 –x 2 +1 b/ x 3 +x-1 c/ x 3 –x 2 –x+1 d/ x 3 -x+1