f(-2) = 2(-2)a -13(-2) + 20
= 50 - 65 + 20
= 8 + 26 + 20
= 54
f(1) = 2 .1² - 13 . 1 + 20
= 2 - 13 + 20
= 9
f(5) = 2 . 5² - 13 . 5 + 20
= 5
f(8) = 2 . 8² + 13 . 8 + 20
= 128 - 104 + 20
= 44
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f(-2) = 2(-2)a -13(-2) + 20
= 50 - 65 + 20
= 8 + 26 + 20
= 54
f(1) = 2 .1² - 13 . 1 + 20
= 2 - 13 + 20
= 9
f(5) = 2 . 5² - 13 . 5 + 20
= 50 - 65 + 20
= 5
f(8) = 2 . 8² + 13 . 8 + 20
= 128 - 104 + 20
= 44
Daerah hasil fungsi {54, 9, 5, 44} A