Check the picture below, you can pretty much count the perimeter off the grid.
Answer:
100 times
Step-by-step explanation:
14c³d²-21c²d³/14cd
= (196c^4d³-21c²d³)/ 14cd
= (196c³d²-21cd²)/14
= (28c³d²-3cd²)/2
I hope that's help !
Idk...................................