Question

1 x+y分之x-y分之x=?分式计算 2 x-1-x+1分之x平方=?分式计算 3 x+1分之x平方-x+1=?分式计

Answer 1

1; =3(x+y)/(x-y)

2:x平方/(2x-1-x+1)=x

3:=-(2x平方-2x-1)/(3x+1)