Пошаговое объяснение:
7b(2b+3)-(b+6)(b-3) = 14b²+21b-b²+3b-6b+18 = 13b²+18b+18
13b²+18b+18 = 13*(-0.1)²+18*(-0.1)+18=0.13-1.8+18 = 16.33
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Пошаговое объяснение:
7b(2b+3)-(b+6)(b-3) = 14b²+21b-b²+3b-6b+18 = 13b²+18b+18
13b²+18b+18 = 13*(-0.1)²+18*(-0.1)+18=0.13-1.8+18 = 16.33