### Home > A2C > Chapter 6 > Lesson 6.2.3 > Problem 6-91

6-91.

For each of the following rational expressions, add or subtract, then simplify.

The denominators are the same, so just add the numerators.

Factor the numerator and look for a Giant One.

See part (a).

The product of the two denominators is the common denominator. Multiply each term by a Giant One to make the denominators the same.

Distribute:

Now, subtract. Notice you are subtracting a negative

in the second term.

See part (c).