Adding and subtracting rational expressions.

Group members: Billy Wilson, David Guilty, Steven Fernandez

By reading this you will learn exactly how to add and subtract rational expressions with the same denominator. This means 2 fractions with variables in them being added and subtracted. To do this you must do the following:

1) Add or subtract the top only, leave the denominator the same.
2) Simplify if possible.
3) Box final answer
Here is an example of this:

9x/2x+3x + 5x/2x+3x

Step 1: 14x/2x+3x
Step 2: 14x/x(2+3) à 14/2+3 à 14/5 à 2 4/5
Step 3:
2 4/5


Adding and subtracting rational expressions using fractions for the class

1.2x/12x + 8x/12x =
2.4x/x+2 + 6/x+2=
3.9d/5+d + 8/d+5=
4.7x/x^2+24 + 8x/x^2+24=
5.4/d+2 + 56+6d/d+2=
6.d^2/d+2 – d/d+2
7.9x/x+4 – 7x/4+x=
8.f/x+4 – f/4+x=
9.2x^2/d+2 – 5x/d+2=
10.hg/d+9 – h^2g/d+9=

Adding and Subtracting Rational Expressions.
1) 9X/3+3X/3=12X/3=4X
2) 12X/5+18X/5=30X/5=6X
3) 7X/6-3X/6=4X/6=2X/3
4) 13X/4-9X/4=4X/4= X
5)17X/8Y-7X/8Y=10X/8Y=5X/4Y


It is very difficult to add and subtract rational expressions. You need to make sure you follow the steps. You may get some answers wrong if you do not follow these steps exactly. Make sure you follow the steps exactly. Basically, you should just follow the steps in the introduction and you should be fine.