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Question
Determine the nature of the roots of the following quadratic equation :
4x2 - 8x + 5 = 0
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Solution
4x2 - 8x + 5 = 0
b2 - 4ac
= (-8)2 - 4( 4)(5)
= 64 - 100
= - 36
Since discriminant is negative, hence the roots are imaginary.
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