Day: September 28, 2018

Week 4 – Precalc 11

ximena

During week 4, I learned how to add and subtract radical expressions. First, you have to make sure that all the terms are in the simplest form, then look for any like terms. If there are like terms, you add or subtract the coefficients together and leave the radicand. If there are no like terms, you cannot add or subtract them.

 

Example:

4\sqrt[]{7} + 13\sqrt[]{7}

= 17\sqrt[]{7}

 

(2\sqrt[]{5} – 6\sqrt[]{5}) + (9\sqrt[]{3} + 3\sqrt[]{3})

= -4\sqrt[]{5} + 12\sqrt[]{3}