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F(-3)=-15
F(3)=9
-------------------
F(x)=4x+-3
F(-2)=4.-2+-3 =-11
F(2) =4.2 +-3 =5
-15 = -3m + c
9 = 3m + c
________________ -
-24 = -6m
-24 : -6 =m
m= 4
y= mx+c
-15= 4.(-3) + c
-15= -12 + c
-15 + 12 = c
-3 = c
y= mx + c
y= 4x - 3 --> f(x)= 4x - 3
f(-2)= 4.(-2) - 3
= -8 - 3
= -11
f(2)= 4 . 2 -3
= 8-3
= 5
f(-2) + f(2)= -11 + 5
= -6