Question

verify that -(-a)=a is true for a = -15/21​

Answer 1

Answer:

-(-15/21)

+15/21

Step-by-step explanation:

please please follow

Answer 2

Answer:

-15/21 *hence, proved*

Step-by-step explanation:

Then,

-(-a)=a

put the value of a= -15/21

-(-(15/21)) = -15/21

-(15/21) = -15/21

-15/21 = -15/21

Hence, Proved