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دو درجی مساواتوں کا نظریہ

دسویں جماعت · ریاضی · 5 سوالات

نام: ____________________   تاریخ: ____________

  1. The discriminant of ax2 + bx + c = 0 is:

    • A -b / 2a
    • B 4ac
    • C b2 + 4ac
    • D b2 - 4ac

  2. If the discriminant is negative, the roots are:

    • A Complex
    • B Real and distinct
    • C Rational
    • D Real and equal

  3. The sum of the roots of x2 - 7x + 12 = 0 is:

    • A -7
    • B -12
    • C 7
    • D 12

  4. The product of the roots of x2 - 7x + 12 = 0 is:

    • A -12
    • B 7
    • C -7
    • D 12

  5. The discriminant of x2 - 4x + 4 = 0 is:

    • A 4
    • B 16
    • C -4
    • D 0

جوابی کلید

1. D, 2. A, 3. C, 4. D, 5. D

  1. Discriminant = b2 - 4ac.

  2. A negative discriminant gives complex roots.

  3. Sum = -b / a = 7.

  4. Product = c / a = 12.

  5. 16 - 16 = 0, so the roots are real and equal.