Question 1004325
(5x-3)(8x^2-4x+15) 
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= 5x(8x^3-4x+15) - 3(8x^3-4x+15)
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= 40x^4 - 20x^2 + 75x - 24x^3 + 12x - 45
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= 40x^4 - 24x^3 - 20x^2 + 87x - 45
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Cheers,
Stan H.
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