You are the one, your videos are the best. I'm just beginning Pre-Calc. Thanks Neo
@profrobbob9 жыл бұрын
Darci Khey Saucedo you're welcome and thanks for watching and liking. Don't forget to subscribe and tell your friends, classmates and teachers to watch and do the same to help these free educational channels grow and remain free:D
@CarQuizzical2 жыл бұрын
same
@profrobbob11 жыл бұрын
You can find the x coordinate of the vertex by doing -b/2a and then plugging the x into the quadratic to find y or complete the square to put the quadratic into standard form. Higher order functions require calculus and an understanding of the first derivative.
@profrobbob11 жыл бұрын
I skipped the step of showing how the common factor of 2 can be factored out of 500 and the second term of 2pi*r, becoming 2(250-pi*r), and then you can divide it with the denominator. Thanks for watching so many videos and taking notes:D
@profrobbob11 жыл бұрын
2R is the diameter of the semicircle and x is the length of the rectangle. Area of a rectangle is l*w so the area is 2R*X or 2XR.
@profrobbob11 жыл бұрын
Thank you Wally...I'm glad to see that first video didn't scare you off and you are watching more...lol I can be your teacher anytime you want to pull up one of my 400 videos to watch and learn from:))
@georgesadler78302 жыл бұрын
Professor RobBob, this is another exceptional Video/lecture on Modeling with Functions Part 2. This material is an important part of Calculus One Optimization and Related Rates word problem section. Students in Precalculus should be familiar with solving these type of word problems.
@profrobbob13 жыл бұрын
@Nooreazy Thank you! I am glad my video helped:) Hope you do great in your class!
@elena91100012 жыл бұрын
Enthusiastic teacher! The Best teacher!
@profrobbob12 жыл бұрын
I hope you did great on your quiz.
@profrobbob11 жыл бұрын
I guess that means you feel lucky now too?!...since I hope you plan on continuing to be one of my KZbin students!!!
@profrobbob13 жыл бұрын
@Lancet25 Thank you...in a way I am with these videos:)
@Nooreazy13 жыл бұрын
THX so much was having trouble with the textbook but you helped me get trough this. Ill spread the word.
@solarism51213 жыл бұрын
Thank you for this!
@profrobbob3 жыл бұрын
You're welcome and THANKS for watching and subbing! Please share this channel with EVERYONE if you continue to find it helpful...especially your teacher...BAM!!!
@profrobbob11 жыл бұрын
On my Chanel's home page search Solving Higher Order Polynomials. I believe that is what you are looking for.
@profrobbob12 жыл бұрын
That is exactly what I am trying to do\:D/ I hope you do great in your class!
@profrobbob13 жыл бұрын
@littleripper312 You are very welcome. I hope you do great in your class:) I would appreciate it if you could return the favor by spreading the word please.
@bellrose3312 жыл бұрын
Thank you so much! You helped me with my homework!
@AAqui-jn5xk3 жыл бұрын
It's was a very big help for me because I have test tomorrow and I'm weak at math
@profrobbob3 жыл бұрын
I hope you passed that test like BAM!!! ...and if you did, please like, sub and share this channel with your class and teacher for future studying and tests!
@ballerv1911 жыл бұрын
THANK YOU SO MUCH. Thank you thank you thank you! Maybe I won't fail my quiz tomorrow!!!!! THANK YOU!!
@profrobbob11 жыл бұрын
You're welcome…and now go pass that quiz like BAM!!!
@WilliamJCrocker11 жыл бұрын
Do you have a video on the Fundamental Theorem of Algebra? Tx bc
@daryaaa43003 жыл бұрын
Thankyou sir!🤗
@profrobbob3 жыл бұрын
You're welcome...thanks for watching! Please sub and share too:D
@annie.albati3 жыл бұрын
Thank youuuuuuu!!! 💜
@profrobbob3 жыл бұрын
Your weeeelllllllcommmmmeeeeeeee!!! Thank you for choosing my videos to learn from😄👨🏫
@profrobbob13 жыл бұрын
@blhailey93 Thank you very much:):):) I hope you "Make a Complete Turn Around in you Class" even if you don't promote my videos...though I would appreciate it. Just the fact you are searching KZbin to try to find help is a sign that you will be successful. Good luck!
@alfars123411 жыл бұрын
Hello Prof, Thanks a lot for your time and this great help that you are giving to the world. I just have a question that is confusing me. At the end of this video, why did you divide by 2 when there is a subtraction sign between the 500 and the 2pie r. I watched your other videos and I remember you kept warning us from doing that. I think that you said when there is a sign between a constant and a variable we don't cancel or divide, we just leave it the same!!!!
@allmusicgirl11 жыл бұрын
How can I find the maxima without using the calculator? I'm assuming to use complete the square ((-b)/(2a)) to find it, right?
@froy9813 жыл бұрын
Thank you
@MrMarkgyuro5 жыл бұрын
Dear ProfRobBob could you tell me why 500x - x^2 looks like this? i understand the basic - x^2. :)
@littleripper31213 жыл бұрын
Thanks, I'm in college and I'm watching these for precal
@aaronmclean86217 жыл бұрын
Nice! Your watch strap matches your belt!
@profrobbob7 жыл бұрын
Sounds like you are really good at paying attention, I'm sure your teachers appreciate that:)
@claudettefrancescabayabay49214 жыл бұрын
Watching this at 3am for my gen math🥺
@profrobbob4 жыл бұрын
Thanks for watching...hope I was able to keep you awake and that you enjoyed learning and if so, please sub and share this channel with everyone...BAM!!!
@aaronweber616111 жыл бұрын
why did you add a 2 in front of XR in the area problen
@chrissotos47277 жыл бұрын
Aaron Weber need double the radius to find the length of the rectangle
@michelleholden71475 жыл бұрын
Chris Sotos thank you!
@jmperez19976 жыл бұрын
Cross country track? No. Running track yes. Other than that, clear and easy to understand.
@30MrBappMan13 жыл бұрын
I Love His Enthusiam in the End..LOL!!! If I Make a Complete Turn Around in Class with his Videos Ill Promote him to my 5k twitter followers, facebook friends and Tumblr followers... #ThatsMyWord!