Предмет: Химия, автор: фраар

структурная формула 4-метил декан

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Автор ответа: scott666

CH3 - CH - CH - CH - CH2 -CH2-CH2-CH2-CH2-CH3
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CH3 C2H5 C3H8

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5. A joint venture is …

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числа a,b и c таковы, что ( a+b ) × ( a + b + c ) = 5, ( b +c ) × ( a + b + c ) = 6, (c + a) × ( a + b + c ) = 7. Найдите ( a + b + c )^2
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