Ответ:
x³-x³-3x²+3x²+9=9
x²-5x+2x-10-3x+6x²=7x²-6x-10
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Ответ:
x³-x³-3x²+3x²+9=9
x²-5x+2x-10-3x+6x²=7x²-6x-10