Question

a= - 9 b=6 c= - 10 verify that (a+b)+c=a+(b+c)
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Answer 1

Answer:

taking LHS

(-9+6)+(-10)

= -3-10

=-13

rhs

-9 + (6+(-10))

= -9+(-4)

=-9-4

= -13

hence proved

Answer 2

Answer:

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

$( - 9 + 6) + ( - 10) = - 9 + {6 + ( - 10)}$

$- 3 - 10 = - 19 + 6$

$- 13 = - 13$

LHS=RHS

Hence Proved