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Question

The roots of 2x26x+8=0 are

A
Real and equal
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B
Equal
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C
Imaginary
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D
Real
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Solution

The correct option is C Imaginary

The value of discrininant of ax2+bx+c=0 is b24ac

For 2x26x+8=0,
value of discriminant is given by, (6)24(2)(8)=3664=28.

Since discriminant i.e -28 < 0,
roots are imaginary.


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