### Concept (1)

Adding and subtracting rational expressions is similar to adding fractions. When adding and subtracting rational expressions, we find a common denominator and then add the numerators. To find a common denominator, factor each first. This strategy is especially important when the denominators are trinomials.

### Sample Problems (6)

Need help with "Factoring: Special Cases Part I" problems? Watch expert teachers solve similar problems to develop your skills.

Factor:

8x² − 32
###### Problem 1
How to factor difference of perfect squares when there is a monomial GCF.

If the area of a square is 49m² + 28m + 4, find the side length.

###### Problem 2
How to find the side length of a square if given its area.

Find the missing term of the perfect square trinomial:

9x² − ___ + 25
###### Problem 3
How to find the missing term of a perfect square trinomial.
###### Problem 4
Determining whether a trinomial is a perfect square trinomial, and writing in a middle term to make a trinomial into a perfect square as a precurser to completing the square
###### Problem 5
Examples of factoring perfect square trinomials.
###### Problem 6
How to determine whether a trinomial can be factored.