what should be added to 2x^3+6x^2-5x+8 to get 3x^3-2x^2+6x+15?
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Answer:
2x+6x (5xtx-2x² +7-5x+8
2x+6xt5xtx-2x² +7-5xt8
2x+x-3x
5x-5x=0
7+8-15
3x-2x² 6x+15
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