Question

. 1. Verify the following properties when a=12 and b=15

a.. a-(-b)=a+b
b.. a+(-b)=a-b
c. -b(-b)=0​

Answer 1

(a) a-(-b)=a+b

LHS= a-(-b)

= 12-(-15)

= 12+15=27.

RHS= a+(-b)

= 12+(-15)

= -3.

LHS not equal RHS.

Answer 2

Answer:

a.12-(-15)=12+15

b. 12+(-15)=12-15

c. -15(-15)=0