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15 September, 10:00

1. Find the product of 2x4 (2x2 + 3x + 4).

2x8 + 3x4 + 4x4

4x6 + 6x5 + 8x4

4x4 + 3x5 + 2x6

3x6 + 4x5 + 5x4

2. Find the product of (3x 4) (2x2 + 2x 1)

6x3 + 2x2 - 5x + 4

6x3 + 14x2 - 11x + 4

6x3 - 14x2 - 5x + 4

6x3 - 2x2 - 11x + 4

3. Find the product of (x2 + 4x 3) (2x2 + x + 6).

2x4 + 9x3 + 4x2 + 21x 18

2x4 + 9x3 + 10x2 + 21x 18

2x4 + 7x3 + 4x2 + 21x18

2x4 + 9x3 + 4x2 + 27x 18,

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Answers (1)
  1. 15 September, 10:07
    0
    A) So 2x4 (2x2 + 3x + 4)

    4x^ (4 + 2) + 6x^ (1 + 4) + 8x4

    4x^6 + 6x^5 + 8x^4

    B) (3x 4) (2x2 + 2x 1)

    6x^ (4 + 2) + 6x^ (4 + 1)

    6x^6 + 6x^5

    C) (x2 + 4x3) (2x2 + x + 6)

    Expanding we have:

    2x^4 + x^3 + 6x^2 + 8x (3 + 2) + 4x^4 + 24x^3

    2x^4 + x^3 + 6x^2 + 8x5 + 4x^4 + 24x^3

    8x^5 + 6x^4 + 25x^3 + 6x^2
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