You can put this solution on YOUR website! (-28x(to the fifth) + 49x(to the fourth) - 35x(to the third) / (-7x(to the fourth)
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[-28x^5 + 49x^4 - 35x^3)/(-7x^4)
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Divide each term in the numerator by the denominator.
= 4x + 7 + (5/x)
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Cheers,
Stan H.