Предмет: Алгебра, автор: buyanovanastya

упростите выражение (k+корень из 3)^2+(k-корень из 3)^2 и найдите его значение при k=-1,5

Ответы

Автор ответа: Yena
22
(k+\sqrt3)^2+(k-\sqrt3)^2=k^2+2k\sqrt3+3+k^2-2k\sqrt3+3=2k^2+6 \\  \\ k=-1,5 \\  \\ 2*(-1,5)^2+6=2*2.25+6=4,5+6=10,5
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