b(b + c) - (b + c)² =b² + bc - b² - 2bc - c² = - bc - c²
Ответ:
Объяснение:
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b(b + c) - (b + c)² =b² + bc - b² - 2bc - c² = - bc - c²
Ответ:
-bc-c2
Объяснение:
b(b+c)-(b+c)2 = b2+bc-b2-2bc-c2 = -bc-c2