2(с-1)(с+2)-(с+6)^2. преобразовать в многочлен
2(c^2+c-2) - c^2-12c-36=2c^2+2c-4-c^2-12c-36=c^2-10c-40
2(c-1)(c+2)-(c+6)^2=2c^2+2c-4-c^2-12c-36=c^2-10c-40
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2(c^2+c-2) - c^2-12c-36=2c^2+2c-4-c^2-12c-36=c^2-10c-40
2(c-1)(c+2)-(c+6)^2=2c^2+2c-4-c^2-12c-36=c^2-10c-40