Diketahui f(x) = x4 + x2 – 3x + 2 dan g(x) = x3 + 2x2 – x – 3. Tentukan
Diketahui f(x) = x4 + x2 – 3x + 2 dan g(x) = x3 + 2x2 – x – 3. Tentukan:
a. f(x) + g(x)
b. f(x) – g(x)
c. f(x) × g(x)
Jawab:
a. f(x) + g(x)
= x4 + x2 – 3x + 2 + x3 + 2x2 – x – 3
= x4 + x3 + 3x2 – 4x – 1
b. f(x) – g(x)
= x4 + x2 – 3x + 2 – (x3 + 2x2 – x – 3)
= x4 – x3 – x2 – 2x + 5
c. f(x) × g(x)
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