Question

taking a= -15 and b= -23, show that a+b=b+a but a-b=b-a

Answer 1

a+b = b+a
-15-23 = -23-15
-38= -38


but

a-b = b-a
-15+23= -23+15
8 = -8
Jo ki possible nhi hai.

Answer 2

a=-15
b=-23

a+b=b+a

(-15)+(-23)=(-23)+(-15)

-38 = -38

but..

a-b = b-a

(-15)-(-23) = (-23)-(-15)

8 = -8

therefore it's not possible