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If a and b are the non-zero roots of the...

If a and b are the non-zero roots of the equation `x^(2) + ax + b = 0`, then the least value of the expression `x^(2) + ax + b` is

A

`(4)/(9)`

B

`(-4)/(9)`

C

`(9)/(4)`

D

`(-9)/(4)`

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The correct Answer is:
D
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