|
x<-7 |
x=-7 |
-7<x<3 |
x=3 |
x>3 |
x+7 |
- |
0 |
+ |
+ |
+ |
x-3 |
- |
- |
- |
0 |
+ |
x+7x−3 |
+ |
0 |
- |
undefined |
+ |
x+7x−3>0
x<−7,x>3
Interval notation (−∞,−7)∪(3,∞)