March 30, 2008
March 26, 2008
Totally Radical!
The word "radical" comes from the Latin word "radix", meaning "root", from which we get not only the word "radical", but also "radish"! Other English words related to “radix” are rutabaga, race, and eradicate.The other use of "radical" means "by the roots" or "from the roots", that is, complete, such as a "radical" change in a person. Another word from the same source is "eradicate" (originally, to "root out" or "pull out by the roots"). The word radix was used for the branches or roots of plants. Later it was generalized to mean origin or beginning. The radical symbol first appeared in 1525 in Die Coss by Christoff Rudolff (1499-1545). Christoff Rudolff wrote Coss (1525), the first book of algebra to appear in German.
In arithmetic the root of a number is the number that is used to build up another number by repeated multiplication. Since 8 = 2*2*2 we say that 2 is the third root of eight. The word root is also used in the mathematics of functions to indicate the value that will produce a zero (a ground level number) for the function. If f(x)= x2-9 then x=3 is one of the roots or zeros of the function. The same root word also gave us the word radical which is used for the symbol indicating a root. Students often call this the square root sign.
March 25, 2008
To let the truth be told
In an effort to assuage many of your fears, I would like to let you know that despite my concerns, the test grades were higher than expected. We had 4 100's in 3rd period, as well as quite a few more As and Bs in both classes.
see more crazy cat pics
So kudos to those of you who studied hard over the break, it was well evident.
If in the future you would be interested in having me post the high score board up here (As only) let me know. Likewise, if you are adverse, please also inform me by comment.
Remember, we have a quiz on Friday. 7.1-7.3.
see more crazy cat pics
March 24, 2008
Extra Work or Extra Credit?
This will be due Tuesday morning before school. Please make sure you turn in all of your work.
Some of you may have tried to access this before but couldn't read it because it was too small.
Liz just left me a message regarding that and I have since reposted the assignment.
Just click on the picture and it should appear larger.
Good Luck.
Chapter 6 Test
The Chapter 6 Test will be on Tuesday when you come back from Easter Break. We will not have much time to review before hand so I recommend that you study over the break and come in on Tuesday morning with questions. If you would like extra help here is a link to test practice that coincides with Chapter 6 from your book.
Or, try here, there's even a game!
March 19, 2008
Roots Rock Radical! (Special Number Chart)
Square roots are something we have been dealing with a lot. Now come the cube, fourth and fifth roots.... Being able to recognize special numbers quickly will be a skill you should like to have. Here is a sheet with a table of different "special" values. Download it if you'd like. Click on it to make it larger.
March 18, 2008
March 14, 2008
March 13, 2008
VIDEO LESSON-Writing an equation from zeros-CH 6.7
make sure to click the button to view it as a full screen!
March 12, 2008
March 8, 2008
March 7, 2008
Synthetic Substitution.... leads to SYNTHETIC DIVISION.
In mathematics, Ruffini's rule allows the rapid division of any polynomial by a binomial of the form x − r. It was described by Paolo Ruffini in 1809. Ruffini's rule is a special case of long division when the divisor is a linear factor. Ruffini's rule is also known as synthetic division.
March 6, 2008
Science and Engineering are almost as cool as math.
Watch the Solid Rocket Boosters detach at 2 minutes and 25 seconds.
Extra Credit or Not
Mr. Jupena and I have decided that instead of giving you some Chapter 5 extra credit, we will be giving a second Chapter 5 test. (Date to be announced, but before the midterm.) The grade issue is still up in the air. We are not sure if we will average the two grades, replace the grade or use the test to supplement the standing grade, but regardless of the choice we make, this decision will only serve to benefit you.
Now, do some math.
March 4, 2008
March 2, 2008
ViDEO LESSON- Properties of Exponents - CH 6.1
make sure you choose the option to view the video full screen.
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