Question

Verify a –( -b) = a + b for the following values of a and b
a = (- 20 ) and b= 15

Answer 1

$a - ( - b) = a + b \\ \\ if \: a \: = \: - 20 \\ b \: = \: 15 \: then \: \\ \\ = > - 20 - ( - 15) = - 20 + 15 \\ \\ = > - 20 + 15 = - 20 + 15 \\ \\ = > - 5 = - 5 \\ \\ = > 5 = 5 \\ \\ = > hence \: verified$

Answer 2

Answer:

a-(-b) = a+b

-20-(-15) = -20+15

-20+15 = -20+15

-5 = -5

Hence prove a-(-b) = a+b

I hope it will helpful.