+2 x -5 = -2 x +5 = -10
The +2 and -5 total -3, and the -2 and +5 total +3
However 2 + 5 = 5 + 2 = +7
That's the best I can do.
* * * * *
Using the quadratic formula, you get
-1.21699 and 8.21699 (to 5 dp)
3
Negative 10 and positive 3
-713
7
-10 and 1
-10
There is no answer, it is not possible
151
6 and 1
2 x 10 = 20 2 + 10 = 12
6
-10