Question

10. Verify that a+b = b+a by taking (1)a= -7/5, b= -2/7
(2) a= -1, b=-2/3​

Answer 1

(1)a=-7/5 b=-2/7

a+b=b+a.

-7/5+(-2/7)=-2/7+(-7/5)

-7/5-2/7=-2/7-7/5

by taken LCM on both sides

- 49-10/35=-10-49/35

-59/35=-59/35

hence proved

a+b=b+a

(2)a=-1 b=-2/3.

a+b=b+a

-1+(-2/3)=-2/3+(-1)

-1-2/3=-2/3-1

taking LCM on both sides

-3-2/3=-2-3/3

-5/3=-5/3

hence proved a+b=b+a