If you distribute the modulus sign over the content in it, it's a mistake, i.e. ∣a+b∣=∣a∣+∣b∣ This is a big mistake, it's a false property!
But for how many pairs of integers (a,b) such that −10≤a≤10 and −10≤b≤10, is the above said "false" property seen to be "true" ?
Note:- ∣a∣ means the absolute value of a.