Hello all. I have a problem here with some sample questions off my video tutor cd that came with my text book.
I think they got the answers wrong on two out of the three examples they posted.
I have uploaded the math problems and their answers as pictures to imageshack so you can see exactly what I am talking about.
ImageShack® - Gallery
For the first one I got:
2r cubed -3r squared +9r
For the second one I got:
y squared -6y -5
and for the third I got the same exact number as them.
Ps how do I write the cubed and squard here besides typing them?
Also if I am wrong can someone explain how?
Thanks in advance for any help.