When you've got a squares bracket, this simply becomes the bracket twice, therefore, (r+s)2 becomes (r+s)(r+s)
You've then go to use FOIL, and this gives you r^2+rs+sr+s^2, and this cannot be simplified any further.
Therefore, the product of this is r^2 + s^2 + rs + sr
Hope this is what you're looking for :)
The answer is D.
explain:
A^2 + b^2 = c^2
9.80 / 20 = 0.49. Justin payed $0.49 per pound. :P
4/3 • 5/3 = 20/9 divided by 2 = 10/9
