Question

2) for a=-12,b=4,c=- 25 ,find whether (c) a+(b+c)=(a+b) +c. (d) b and c are closed under subtraction​

Answer 1

Answer:

a+(b+c)=(a+b) +c

-12+(4+(-25))=((-12)+(4)

-12+(-21)=(-8)

(-33)=(-8)

=(-8)+33

=25