# Week 15 – Adding Rational Expressions

During week 15 we learnt how to add and subtract radical expressions, in the picture above I demonstrate the part of addition

For the first example, There is an expression with the denominators being the same so all you have to do is add across. An important note, to subtract or add your denominator must be the same for both sides.

For the second expression the denominators are different so what was done in the example to find the lowest common multiple is we’ve multiplied each side with the opposite denominator so that the denominators become the same and then you simply add across