Wednesday, August 29, 2007

Homework 8/29

p.65 #41-44

8 comments:

ashish said...

need help on #44. i multiplied using the differnce of squares and now im stuck

Matt Hickman said...

It should work itself out once you use the difference of squares. You used sqrt(2+x)+sqrt(2), right?

Ashley said...

I need help on number 43. I have used the difference of squares on the bottom, and then I did the same for the top, but I still get a zero on top. Is it und.?

Ashley said...

never mind Mr. Hickman I was confused..Sorry :)

ashish said...

yes, and im still not getting it. now i have 2+x-2 / x(sqrt(2+x)+sqrt(2). im not sure how i get rid of the x on the bottom

Ashley said...

Can that problem be done. I checked it in the calc. and it says error

Matt Hickman said...

2+x-2 = x

Matt Hickman said...

Yes, it can be done. The reason your calculator gives you an error is that you have to simplify the function before you can plug in the value.