Expression 5: "f" left parenthesis, "x" , right parenthesis equals negative StartFraction, 1 Over 200 , EndFraction "x" cubed plus StartFraction, 3 Over 10 , EndFraction "x" squaredfx=−1200x3+310x2
5
Expression 6: negative StartFraction, 1 Over 200 , EndFraction left parenthesis, "x" minus 20 , right parenthesis cubed plus 6 left parenthesis, "x" minus 20 , right parenthesis plus 80−1200x−203+6x−20+80
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left parenthesis, 40 , 160 , right parenthesis40,160
left parenthesis, 20 , 80 , right parenthesis20,80