# Simplify rational expressions: common monomial factors

Factor the numerator and the denominator of a rational expression and cancel out common monomial factors.

### Problem

Ivan and Javier manipulated the rational expression start fraction, 6, x, plus, 4, divided by, 12, x, plus, 4, end fraction. Their responses are shown below.
IvanJavier
start fraction, 3, x, plus, 2, divided by, 6, x, plus, 2, end fractionstart fraction, 6, x, divided by, 12, x, end fraction
Which student wrote an expression that is equivalent to the original expression?
Please choose from one of the following options.