2
All the time
7
15.
-3 minus -11 is 8.
It is: 9-4 = 5
2
All the time
That is impossible, it doesn't work. the answer in the textbook or whatever must be wrong. It is 5
31
7
15.
9 - -2 = 11
By factoring I get x-3 divided by x+3
-3 minus -11 is 8.
4 squared minus 2 squared equals 12
(-x)2 = 3=> -x = ±√3=> x = -√3 and x = √3