Question

if a=(-8) b=(-7) c=(6) verify that (a+b)+c=a(b+c)


fast pls i need answer​

Answer 1

If a=(-8) b=(-7) c=(6) verify that (a+b)+c=a(b+c)

Now, putting the values & verifying LHS = RHS

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

=[ (-8) + (-7) ] + 6 = (-8) [ (-7) + 6 ]

= (-15) + 6 = (-8) × (-1)

= (-9) ≠ 8

LHS ≠ RHS

(VERIFIED)

Answer 2

Answer:

Note: I guess you have mistaken in typing the question, the verification must have to be done for (a+b)+c = a+(b+c).

$a = - 8 \\ b = - 7 \\ c = 6 \\ \\ \\ LHS \: = (a + b) + c \\ = [( - 8) + ( - 7)] + 6 \\ = ( - 15) + 6 \\ = ( - 9)$

$RHS = a + (b + c) \\ = ( - 8) + [( - 7) + 6] \\ = ( - 8) + ( - 1) \\ = ( - 8) - 1 \\ = ( - 9)$

$LHS \: = RHS \\ \implies (a + b) + c = a + (b + c) \\ hence \: proved$