Ответ:
=x³+6x²+12x+8-(x³-6x²+12x-8)=x³+6x²+12x+8-x³+6x²-12x+8=12x²+16
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Ответ:
=x³+6x²+12x+8-(x³-6x²+12x-8)=x³+6x²+12x+8-x³+6x²-12x+8=12x²+16