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what is the difference when 2x^3+x-5 is subtracted from 6x^3-x-^2+4x+8?
Subtract the x³'s from the x³'s, the x²'s from the x²'s, the x's from the x's, and the constants from the constants.
Here is 6x³-x²+4x+8 minus 2x³+x-5. Any numbers with only one value have a 1 added to them and any numbers with no value have a 0 added to them as placeholders. Notice how I have changed every sign on 2x³+x-5 so that we do not forget we are subtracting every term. The double negative becomes a positive, thus the +5.
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