f(x) = 7x - 20x + 16x
f(7) = (7×7) - 20×7 + 16×7
f(7) = 49 - 20×7x + 16×7
f(7) = 49 - 140 + 16×7x
f(7) = 49 - 140 + 112
f(7) = −91+112
f(7) = 112−91
f(7) = 21
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Penjelasan dan langkah langkah
f(x) = 7x - 20x + 16x
f(7) = (7×7) - 20×7 + 16×7
f(7) = 49 - 20×7x + 16×7
f(7) = 49 - 140 + 16×7x
f(7) = 49 - 140 + 112
f(7) = −91+112
f(7) = 112−91
f(7) = 21