Question

Упростите выражение!Срочно!

Answer 1

((y+1)/(y-1)-y/(y+1))÷(3y+1)/(y^2+y)=((y+1)(y+1)-y(y-1)/(y-1)(y+1) )÷(3y+1)/(y^2+y)=((y+1)^2-y^2+y/(y-1)(y+1) )÷(3y+1)/(y2+y)=(y^2+2y+1-y^2+y/(y-1)(y+1) )÷(3y+1)/(y^2+y)=(3y+1)/(y-1)(y+1)÷(3y+1)/y(y+1)=(3y+1)/(y-1)(y+1)*y(y+1)/(3y+1)=y/(y-1)