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[" 10.Let two numbers have arithmetic me...

[" 10.Let two numbers have arithmetic mean 9and geometric mean 4.Then these numbers "],[" are the roots of the quadratic equation "],[[" 1) "x^(2)-18x-16=0," 2) "x^(2)-18x+16=0," 3) "x^(2)+18x-16=0," 4) "x^(2)+18x+16=0]]

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