Determine the values of x for which the function f is decreasing, where
f(x)=(440−x)^(2)+x^(2)
enter your answer in interval notation
use your answer to determine which is bigger, 154^(2) + 286^(2) or 198^(2) + 242^(2)

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find the zeros?

solve for 0
ie -880+4x=0

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