Question

x=-7 y=-8 z=9 (x+y)+z=x+(y+z)
verify then​

Answer 1

Answer:

(7+8)+9=7+(8+9)

15+9=7+17

24=24

Answer 2

To verify :-

x = (-7), y = (-8), z = 9

so

(x+y)+z = x+(y+z)

[put the value of variables]

=> {(-7)+(-8)} + 9 = (-7)+{(-8)+9}

=> {(-7)-8} + 9 = -7 + (+9-8)

=> -15+9 = -7+1

=> -6 = -6

=> LHS = RHS

hence verified.

Formula used :-

• (-)(-) = (+)
• (+)(-) = (-)
• (-)(+) = (-)
• (+)(+) = (+)

hope it helps.