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Friday, October 14, 2005

Quadratic Roots

So I’m the scribe today and hopefully you guys get something from my post. This isn’t going to be long but I will try my best to explain what we just have learned today :)

Today in class, Mr. K wrote these problems on the board for us to do:

Example #1:

For what values of k will the sum of the roots of the following equation be 8?
x²-(k²-2k)x+3=0

*Remember! To do this, first set up what’s a, b, and c.



*solving an equation always means finding the roots!


Well, I was having trouble on the first roots problem. But thanks to Mr. K for helping me out and refreshing my memory about the quadratic stuffs because to let you guys know, I really have a bad memory.

Example #2:

Find the one quadratic function whose roots are 3/2 and -1/4. Is the equation unique?



Example #3:

If 3x²-mx+2=0 can be factored, what values of m are possible?



Example #4:

For what values of k will the equation 2x²+4x+(2+k-k²)=0 have exactly one root?
*LOOK FOR THE DISCRIMINANT!



And for the last thing we did in class was we took down some notes in our dictionary called WORKING WITH QUADRATIC ROOTS.

So..time to say bye now because I’ve done what I was supposed to get done :) and oh yah, the scribe on Monday is Jackie S. Have fun!

1 Comments:

At 10/14/2005 11:55 PM, Blogger AichelleS. said...

that was really good and refreshing, good job

 

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