Just as when we multiply any binomials, we need to make sure every term is multiplied by both terms in the other parentheses. An acronym that helps people organize this is FOIL, which stands for firsts, outsides, insides, lasts. When multiplying radicals, we multiply the numbers outside and also the numbers inside. After the terms have been multiplied, the next step is to combine like terms- we can add or subtract radicals that have the same radicand, or number under the root.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
Experience the 'A-Ha!' moment with the best teachers
whom we hand-picked for you!
M.A. in Secondary Mathematics, Stanford University B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
“Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
“Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
“You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”