### Home > INT3 > Chapter 12 > Lesson 12.1.3 > Problem12-42

12-42.
1. Simplify each expression below. Homework Help ✎

Multiply both the numerator and the denominator by a common denominator; use Giant Ones to eliminate the denominators.

$\frac{\frac{x+1}{2x}}{\frac{x^2-1}{x}}·\frac{2x}{2x}$

Factor the denominator and then simplify. (Look for another Giant One.)

$\footnotesize \frac{x+1}{2(x+1)(x-1)}$

$\frac{1}{2(x-1)}$

Follow the steps in part (a).

A common denominator is x(x + 3).