Question 318862
5(3-4x)^2 -8(3-4x)(5x-1)

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(3-4x)[5(3-4x) -8(5x-1)]
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= (3-4x)[15-20x - 40x+8]
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= (3-4x)(23-60x)
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= 69 - 180x -92x + 240x^2
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= 69 - 272x + 240x^2
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Cheers,
Stan H.