Transcript 12.6 Adding and Subtracting Radical Expressions CORD Math Mrs. Spitz Spring 2007 ©created by patspitz.

12.6 Adding and Subtracting
Radical Expressions
CORD Math
Mrs. Spitz
Spring 2007
©created by patspitz
Announcements
• No School on Friday due to Parent/Teacher
conferences. This an opportunity for your parents to
get a get out of 1 homework assignment free for you.
• I will check 14.10 assignment, Chapter 14 Review,
Binder for all of Chapter 14 notes, and 12.5. These
are new assignments for the 4th quarter.
• If you missed last Friday, you must be excused to take
the make-up exam which will be administered Tuesday
during Study Hall and lunch and Wednesday during
Lunch. I need to return exams to all students
Thursday.
• If you are planning on missing class on Thursday; keep
in mind that you have a quiz scheduled for that date.
You may NOT make up quizzes.
Reminders:
• Attendance—especially seniors. You fail at 11
absences. This is the Taos Municipal School
District policy. You must have a 90%
attendance rate in order to get credit for a
class. (Especially SENIORS)
• Tuesday/Wed – 12.6
• Wed/Thurs.-12.7 and Quiz
Objective
• Simplify radical expressions involving
addition and subtraction.
Assignment
• pp. 499-500 #5 – 39 all
Ex. 1: 3 11  6 11  2 11
3 11  6 11  2 11
(3  6  2) 11
7 11
Ex. 2:
9 7 4 2 3 2 5 7
9 7 4 2 3 2 5 7
9 7 5 7 3 2 4 2
(9  5) 7  (3  4) 2
14 7 1 2
14 7  2
Ex. 3: Find the exact measure of the
perimeter of the rectangle.
3 32
2 6 3
P  2l  2 w
P  2(2 6  3)  2(3 3  2)
P  4 6 2 3 6 3 4
P  4 6 8 3  4
IMPORTANT
• If each radical in a radical expression is
not in simplest form, simplify them first.
• Then use the distributive property,
whenever possible, to further simplify the
expression.
Ex. 4: 7 98  5 32  2 75
7 98  5 32  2 75
7 49 2  5 16 2  2 25 3
7  7 2  5 4 2  25 3
49 2  20 2 10 3
69 2 10 3
Ex. 5: Simplify, then use a calculator to
verify your answer.
3 7  2 28
 3 7  2 47
 3 7  22 7
3 7 4 7
 1 7
  7;2.65
Ex. 6: Simplify, then use a calculator to
verify your answer.
3 27  5 48
 3 9  3  5 16 3
 3 3 3  5 4 3
 9 3  20 3
 29 3;50.23
Don’t Forget
• Quiz Wed/Thurday.
• Parent Teacher conference – get a
free homework pass.