<PRE><B>Question 672042</B>
(7x^4-4x^2+x) - (7x^3+8x^2+9x) + (2x^2-x) 
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7x^4 - 4x^2 + x - 7x^3 - 8x^2 - 9x + 2x^2 - x
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= 7x^4 - 7x^3 - 10x^2 - 9x 
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= x[7x^3 - 7x^2 - 10x - 9]
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Cheers,
Stan H.
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