Question

What is simplify expression (combine like terms) y/y+1 - y/y+3

Answer 1

y y
------- - -------
y+1 y + 3

LCD = (y + 1)(y + 3):-

so we have
y(y+3 ) - y(y + 1) y^2 + 3y - y^2 - y 2y
--------------------- = ----------------------- = ----------------- answer
(y + 1)(y + 3 (y + 1)(y + 3) (y + 1)(y + 3)