Answer:

Step-by-step explanation:
f(x) = −3(x² - 2x + 1) + 3
f(x) = −3x² + 6x - 3 + 3
f(x) = −3x² + 6x
** The above answer is written in reverse, which is the exact same result.
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4(20 + x)
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Step-by-step explanation:
The answer is an = 7n - 10.
I think answer should be 21