verify that a+b = b+any taking {1} a= -7/5, b = 2/7 {2} a=-1 b= -2/3
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Hi friend,
a=-7/5
b=2/7
a+b=b+a
Take LHS,
a+b=-7/5+2/7
=-7/5×7/7+2/7×5/5
=-49/35+10/35
=-49+10/35
=39/35
Take RHS
b+a=22/7+(-7/5)
=2/7-7/5
=2/7×5/5-7/5×7/7
=10/35-49/35
=10-49/35
=39/35
LHS=RHS
a+b=b+a
Hence proved
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