Найдите значение выражения
[tex] \sqrt{a { }^{2} - 4ab + 4b { }^{2} } [/tex]
при a=3, b=4
[tex] \sqrt{a { }^{2} - 4ab + 4b { }^{2} } [/tex]
при a=3, b=4
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Ответ: 5
a^2-4ab+4b^2=(a-2b)^2
√((a-2b)^2)=|a-2b|=|-5|=5
3-2*4=-5