Discussion
If 
, for all x, what is the value of 
?
| (A) | −2 |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 06/03/2014 10:11
I follow it up to where the brackets around the "(x^2 -2x)" are taken out, why does the "2x" go from negative to positive when the brackets are eliminated?
Posted: 06/10/2014 10:48
Miranda, "2x" goes from negative to positive, because of the negative sign in front of the bracket. Think of the negative sign in front of any bracket as -1. -1 multiplies into -x^2 and -2x, resulting in -x^2 + 2x.