Pearson Algebra 1 Common Core, 2015
PA
Pearson Algebra 1 Common Core, 2015 View details
1. Simplifying Rational Expressions
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Exercise 1 Page 667

We want to simplify the given rational expression. We will start by factoring the expression as much as we can. Then, we will cancel out any common factors.
3x+9/x+3
3(x+3)/x+3
3(x+3)/x+3
3/1
3

We simplified the given expression. Finally, we will identify the restrictions on the variable from the denominator of the simplified expression and from any other denominator used. Since our final expression is not a fraction, we need to look at the expression before canceling out common factors.

Denominator Restrictions on the Denominator Restrictions on the Variable
x+3 x+3≠ 0 x≠ - 3

We found one excluded value of the variable x. x≠ - 3