tolong dong ,butuh banget nih,bsk pag dikumpul,pakai jalannya yaaa

1. f(-2) = 3 - 2(-2²)
= 3 - 8
= -5 (b)
2. f(4) = a.4 + b = 19
f(2) = a.2 + b = 7
______________-
2 12
a = 12/2 = 6

f(4) = 6.4 + b = 19
= 24 + b = 19
b= 19-24
b= -5
jadi jawabannya f x = 6x - 5 (a)
3. 4 1/2

Maaf kalok salah :v