what should be added to 4x-6x³+7 to get 7x²-6x+3+2x³
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8x^3+7x^2-10x-4
Step-by-step explanation:
?+4x-6x^3+7=7x^2-6x+3+2x^3
?=7x^2-6x+3+2x^3-(4x+6x^3-7)
7x^2-6x+3+2x^3-4x+6x^3-7
8x^3+7x^2-10x-4
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