Parts of plane, for example, complete (4,3,6)
I believe the answer is:
root and branch
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for root and branch that I've seen before include "(Extirpated) utterly" , "Utterly -- radically" , "completely" , "Thoroughly" , "(Of a process) thorough, radical" .)