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اجزائے ضربی

نویں جماعت · ریاضی · 6 سوالات

نام: ____________________   تاریخ: ____________

  1. Factorise x2 - 9.

    • A (x + 3)(x - 3)
    • B (x + 9)(x - 1)
    • C (x - 3)2
    • D x(x - 9)

  2. Factorise x2 + 5x + 6.

    • A (x - 2)(x - 3)
    • B (x + 1)(x + 6)
    • C (x + 5)(x + 1)
    • D (x + 2)(x + 3)

  3. Factorise 2x + 6.

    • A 6(x + 2)
    • B 2(x + 6)
    • C 2(x + 3)
    • D x(2 + 6)

  4. Factorise x2 - 5x + 6.

    • A (x - 1)(x - 6)
    • B (x - 2)(x - 3)
    • C (x + 2)(x + 3)
    • D (x - 5)(x - 1)

  5. Which is a factor of x2 + 7x + 12?

    • A x + 6
    • B x + 2
    • C x - 3
    • D x + 3

  6. Factorise 4x2 - 25.

    • A (x + 5)(4x - 5)
    • B (2x - 5)2
    • C (4x + 5)(x - 5)
    • D (2x + 5)(2x - 5)

جوابی کلید

1. A, 2. D, 3. C, 4. B, 5. D, 6. D

  1. x2 - 9 = x2 - 32 = (x + 3)(x - 3).

  2. Two numbers with product 6 and sum 5 are 2 and 3.

  3. Take out the common factor 2.

  4. Two numbers with product 6 and sum -5 are -2 and -3.

  5. x2 + 7x + 12 = (x + 3)(x + 4).

  6. 4x2 - 25 = (2x)2 - 52 = (2x + 5)(2x - 5).