Ответ:
Х(Х+6)-2Х(Х-3)=х²+6х-2х²+6х=12х-х²
12*(-5)-(-5)²=-60+25=-35
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Ответ:
Х(Х+6)-2Х(Х-3)=х²+6х-2х²+6х=12х-х²
12*(-5)-(-5)²=-60+25=-35