Jika f(x) = x + 2, maka f(x2) + 3f(x) – (f(x))2 =
Jika f(x) = x + 2, maka f(x2) + 3f(x) – (f(x))2 = ….
Jawab:
f(x) = x + 2
f(x2) + 3f(x) – (f(x))2
= (x2 + 2) + 3(x + 2) – (x + 2)2
= x2 + 2 + 3x + 6 – x2 – 4x – 4
= 4 – x
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