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Answer:
f(8) = 33.84 or -3.2
Step-by-step explanation:
f(x) and f(y) could be taken as any value. Answers will always vary depending on the values of x and y used.
So I'' be taking f(x) as f(4) and f(y) as f(2)
f(4)f(2) = f(16+3) + 3f(6) - 3f(2) + 12
f(4)f(2) = 19f + 18f - 6f + 12
f(4)f(2) = 31f+12
8f^2-31f-12 = 0
f = 4.23 and -0.4
f(8) = 4.23x8 or -.4x8 (answers will always vary and .4 is the same as 0.4)
f(8) = 33.84 or -3.2
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