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Let two numbers have arithmatic mean 9 a...

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

A

`x^(2)+18x-16=0`

B

`x^(2)-18x+16=0`

C

`x^(2)+18x+16=0`

D

`x^(2)-18x-16=0`

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The correct Answer is:
B
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