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15Denis24
@15Denis24
August 2022
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какие наименьшие значения может принимать этот квадратный трёхчлен?
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ilya006
Х1+х2=9
х1*x2 = 11
(x1+x2)^2 = x1^2 +2x1x2+x2^2
х1^2+х2^2 = (x1+x2)^2 - 2x1x2 = (11)^2 -2*9 = 121 - 18=103
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Answers & Comments
х1*x2 = 11
(x1+x2)^2 = x1^2 +2x1x2+x2^2
х1^2+х2^2 = (x1+x2)^2 - 2x1x2 = (11)^2 -2*9 = 121 - 18=103