bantu saya kaak ....

g(7) = 10
7a+b = 10.......(1)
.
g(1) = 0
a+b = 0.........(2)
.
Eliminasi pers 1 dan 2
7a+b = 10
a+b = 0
--------------- -
6a = 10
a = 10/6
a = 5/3
b = -5/3
.
Maka g(-2) = 5/3 (-2) + (-5/3)
= -10/3 -5/3
= -15/3
= -5 (D)