# How would I expand this equation??

• Apr 29th 2013, 03:16 AM
BryannaAllan
How would I expand this equation??
Attachment 28191 How would I expand this.
• Apr 29th 2013, 03:25 AM
topsquark
Re: How would I expand this equation??
Quote:

Originally Posted by BryannaAllan
Attachment 28191 How would I expand this.

How do you expand $\displaystyle (a + b)^2$? Let $\displaystyle a = 5.913 \sqrt{x - 60}$ and b = 7.

-Dan
• Apr 29th 2013, 03:34 AM
BryannaAllan
Re: How would I expand this equation??
I do know how to tackle the question with that rule but I am unsure as to what the actual answer would come out looking like due to the square root.
• Apr 29th 2013, 03:54 AM
Prove It
Re: How would I expand this equation??
Well what have you tried? Don't shy away just because it looks a little more difficult than normal. You'll never achieve anything like that...
• Apr 29th 2013, 04:00 AM
topsquark
Re: How would I expand this equation??
Show us what you've got. If it isn't right, we'll help. (Nod)

-Dan
• Apr 29th 2013, 04:03 AM
BryannaAllan
Re: How would I expand this equation??
No as in I have written it out three times and then tried it on the calculator and all three times it has been wrong. So far I have gotten 34.963569(x-60) +82.782(sq root) x-60 +49
• Apr 29th 2013, 04:11 AM
Prove It
Re: How would I expand this equation??
Assuming that sqrt is supposed to cover (x - 60) [some brackets where they're needed would be nice] I agree with your answer...
• Apr 29th 2013, 04:21 AM
BryannaAllan
Re: How would I expand this equation??
If I were to integrate that, how would i actually do it with the square root there? Would I also be able to expand the first part of the equation to 34.963569x-2097.81414? How could i expand the second part like that to make it easier to integrate?
• Apr 29th 2013, 04:54 AM
Prove It
Re: How would I expand this equation??
Try a u-substitution with u = x - 60.