alleryThe quantity b^2 - 4ac is called the
ACoefficient of the linear term
BDifference of cubes of coefficients
CDeterminant of a matrix system
DDiscriminant of the equation
Answer & Solution
Correct answer: D. Discriminant of the equation
1. The expression sits under the square root in the formula.
2. Its sign decides whether roots are real or imaginary.
3. This quantity is the discriminant, often written D.
4. So option A is correct.
_Source: Selina Concise Mathematics Class 10, Ch 5 Quadratic Equations (Mistral OCR'd PDF), section on discriminant_
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