Question

prove here that L.H.S =R.H.S.
a+b =a-(-b)
a= 21, b=57​

Answer 1

Answer:

Even if the values of a and b are not given we can prove it :

RHS = a-(-b) =  a+b (since - × - would become +)

Method 2 :

by using the values given :

LHS = 21+57 = 78

RHS = 21-(-57) = 21+57 = 78

LHS = RHS

Hence proved

Hope it helps :)

Very illogical question but still im answering it