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11 June, 02:12

Let f (x) = x^3+2x^2+3x+1 and g (x) = 4x-5 find f (x) * g (x)

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  1. 11 June, 02:41
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    Answer: f (x) * g (x) = 4x^4-x^3+7x^2-11x-5

    Step-by-step explanation: I usually just split the expression into terms but you're welcome to solve it the vertical way.

    4x (x^3+x^2+3x+1) = 4x^4+4x^3+12x^2+4x = A

    -5 (x^3+x^2+3x+1) = - 5x^3-5x^2-15x-5 = B

    Add A and B together.

    4x^4-x^3+7x^2-11x-5
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