How to combine two trinomials by alligning vertically

This lesson will explain how to combine two trinomials by alligning vertically by looking at an example problem and making sure that the variables have the same variable factors so they are like terms and than... This lesson will explain how to combine two trinomials by alligning vertically by looking at an example problem and making sure that the variables have the same variable factors so they are like terms and than they can be combined.
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