Answer:
min = -14; max = 326
Explanation:
Assuming this is actually supposed to be f(x)=x³ - 6x² + 9x+2, instead of f(x)=x²³ - 6x² + 9x+2:
Find f(-1) = (-1)³-6(-1)²+9(-1)+2 = -14
and f(9) = (9)³-6(9)²+9(9)+2 = 326
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