Since AM = 2cm and AC = 6cm we can write the following:
AM + AC = 8cm
So, now we only create a fraction demonstration the length from AM to AC:
which can be simplified to 
Conclusion/answer:
The length from AM to AC is: 
Hope it helped,
BioTeacher101
Step-by-step explanation:
Square root of 25 can be +5 or -5
Square root of 16 can be +4 or -4.
As -5 can be square root of 25 and +4 can be a root of 16 , -5 < +4 . That's why square root of 25 could be less than square root of 16.