. Вычислите рациональным способом[tex] \frac{ {38}^{2} - {17}^{2} }{ {47}^{2} - {19}^{2} } [/tex]. Created by olgamelnikova84. algebra-ru

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olgamelnikova84 @olgamelnikova84

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. Вычислите рациональным способом
[tex] \frac{ {38}^{2} - {17}^{2} }{ {47}^{2} - {19}^{2} } [/tex]

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oqilovmehrob

Ответ:

$\frac{ { 38}^{2} - {17}^{2} }{ {47}^{2} - {19}^{2} } = \frac{(38 - 17)(38 + 17)}{(47 - 19)(47 + 19)} = \\ \frac{21 \times 55}{28 \times 66} = \frac{3 \times 5}{4 \times 6} = \frac{15}{24} = \frac{5}{6}$

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olgamelnikova84 September 2021 | 0 Ответы

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