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For the equation x squared plus 4x minus 5 equals 0, the discriminant is:
A16
B20
C26
D36
Answer & Solution
Correct answer: D. 36
1. Square 4 to get 16.
2. Subtract 4 times 1 times minus 5, which adds 20.
3. The discriminant is 36.
_Source: NCERT Class 10 Mathematics, Chapter 4, Quadratic Equations._
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