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Which of the following statements are tr...

Which of the following statements are true regarding the expression f(x)=`2x^(2)+4x+9` ?
I. The expression has a least value of 7
II. The value of the expression is always positive for any value of x
III. The roots of f(x)=0 are irrational

A

Only I

B

Only II

C

Only III

D

Both I and II

Text Solution

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The correct Answer is:
D
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