31Dec

Решите: 1) 3a(a+2) - (a+3)² 2) 3(y-1)² + 6y 3) 4ab + 2(a-b)²

Leralove Алгебра 1 1

Решите: 1) 3a(a+2) - (a+3)² 2) 3(y-1)² + 6y 3) 4ab + 2(a-b)²

Posted by Leralove | Posted at Dec 31, 2013 | Categories: Алгебра

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Titarica
Titarica

3a(a+2) - (a+3)²=3a-6a-(a²-6a-a²+6a-9=3a²-a²-9=2a²-9 ответ:2a²-9

Dec 31, 2013 20:51

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