Bell Ringer – Math journal entry

1. Bell Ringer – Math journal entry • Yesterday we discussed Properties of Exponents. • Summarize yesterday’s lesson using mathematical vocabulary. • Underline the math vocabulary words you use. • Choose 2 of your math vocabulary words and define them using either your smart phone, the textbook under your desk, or a dictionary from the bookshelf.

2. RADICALS Tuesday, January 28, 2014

3. Vocabulary • What is a radical? What is a radicand? What is the index?

4. Simplifying radicals • Look at the index. • If the index is 2, find the greatest perfect square that will go into the radicand. • If the index is 3, find the greatest perfect cube that will go into the radicand. • If the index is n, find the greatest perfect factor of n that will go into the radicand. • Pull out those perfect squares, cubes etc. Anything left over stays in the radicand.

5. Simplifying radicals • When simplifying radicals with variables… • Divide the exponent of the variable by the index. • Pull out that variable. • Anything left over stays in the radicand.

6. Reminders • Even indexes must be positive or they are imaginary, not real. • Odd indexes can be negative. • The square root of a number can be re-written as that number to the ½ power. Likewise, the cube root can be written as the number to the 1/3 power. So, the rules of exponents apply! • Radicals are like parenthesis. Distribute to everything. • Even root with an odd power…need absolute value!

7. Classwork • With your learning partner, do the ODD problems from the Simplifying Radicals worksheet.

8. homework • Complete the Simplifying Radicals worksheet.

9. Exit ticket • On your index card: • First and Last name • Block • Seat Preference (number)