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5x^{3}-3x+6-2x^{2}+4x-8
To find the opposite of 2x^{2}-4x+8, find the opposite of each term.
5x^{3}+x+6-2x^{2}-8
Combine -3x and 4x to get x.
5x^{3}+x-2-2x^{2}
Subtract 8 from 6 to get -2.
5x^{3}-3x+6-2x^{2}+4x-8
To find the opposite of 2x^{2}-4x+8, find the opposite of each term.
5x^{3}+x+6-2x^{2}-8
Combine -3x and 4x to get x.
5x^{3}+x-2-2x^{2}
Subtract 8 from 6 to get -2.