tolong bantu yg nomor 7 ya teman teman, please help me, tolong ya teman yg nomor 7 makasih sebelumnya

f(x)=ax+b
f(-3)=a.-3+b= -3a+b=-15
f(3)=a.3+b =3a+b = 9
_________-
-6a=-2
a=-24:-6
a=4
-3a+b=-15
-3.4+b=-15
-12+b=-15
b=-15+12
b=7

f(-2)=4.-2+7=-8+7=-1
f( 2)=4.2+7=8+7=15

jadi, f(-2) + f(2)=-1+15
=14

semoga bermanfaat yaa jawabannya :)