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a) x = - 3 ⇒ f(- 3) = -3(-3) + 6
= 15
x = 2 ⇒ f(2) = -3(2) + 6
= 0
b) f(a) = - 9
- 3a + 6 = - 9
- 3a = - 15
a = 5
a. f(-3)= -3(-3)+6 = 9+6
=15
f(2)= -3(2)+6= -6+6
=0
b. f(a)=
-3a+6=9
-3a= 9-6
-3a=3
a=-1
maaf kalo salah