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KuPI0LLIA
@KuPI0LLIA
August 2022
1
32
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Известно, что a-b= 7, a ab= -4. Найдите значение выражения (a+b)^2
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sokol102003
(a+b)²=a²+2ab+b²=a² + 2ab +b²-2ab+2ab=(a²-2ab+b²)+4ab=(a-b)²+4ab= 7²+4*(-4)= 49-16=33
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