x is equal to 3x cube minus 3x plus 1 and x is equal to 3
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Subtracting polynomials is quite similar to adding polynomials, but there are those pesky "minus" signs to deal with. If the subtraction is being done horizontally, then the "minus" signs will need to be taken carefully through the parentheses. If the subtraction is done vertically, then all that's needed is flipping all of the subtracted polynomial's signs to their opposites.
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