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12 June, 16:25

Write the product in descending powers of x. (x2 + 3x + 1) (x2 + x + 2)

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  1. 12 June, 19:32
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    Multiply each term in one bracket by each in the other:

    (I assume x2 means x^2 / x squared)

    (x^2 + 3x + 1) (x^2 + x + 2)

    = x^4 + x^3 + 2x^2 + 3x^3 + 3x^2 + 6x + x^2 + x + 2

    Now collect all terms:

    = x^4 + 4x^3 + 6x^2 + 7x + 2
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