Question

6. The value of ax2 + bx + c at x=-b/a is.
(a) a (b)b square-4ac (c) 0 (d)c

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Answer 1

Step-by-step explanation:

Definition of discriminant: For the quadratic equation ax2 + bx + c =0, a ≠ 0; the expression b2 - 4ac is called discriminant and is, in general, denoted by the letter 'D'.

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Examine the Roots of a Quadratic Equation.

Discriminant of ax2 + bx + c = 0 Nature of roots of ax2 + bx + c = 0 Value of the roots of ax2 + bx + c = 0

b2 - 4ac = 0 Real and equal - b2a, -b2a

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