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     EduGorilla 
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    Let two numbers have arithmetic mean 9 and geometric mean 4. Then these numbers are the roots of the quadratic equation 

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    1. x+ 18x + 16 = 0
    2. x- 18x + 16 = 0
    3. x+ 18x - 16 = 0
    4. x2 - 18x - 16 = 0
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