Add and Subtract Rational Expressions
Same Denominator
Simplify[(x + 1)/(x - 2) + (2x - 3)/(x - 2)]
Different Denominators
Simplify[(1/x) + (2/(x + 1))]
More:
Simplify[(x + 2)/(x^2 - 1) - (x - 1)/(x^2 - 1)]
What is the common denominator? How does CAS help students confirm or discover the correct procedure?