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Question

The discriminant of the equation 2x25x2=0 is
  1. 41

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Solution

The correct option is A 41

Quadratic equation: 2x25x2=0
We know that discriminant of a quadratic equation ax2+bx+c=0 is given by
D=b24ac.

Here, a = 2, b = -5 and c = -2
Therefore, discriminant of the given quadratic equation
=(5)24×2×(2)=25+16=41


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