Question

$\frac{5}{3 - 2 \sqrt{3} } + \frac{5}{3 + 2 \sqrt{3} }$
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Answer 1

Ответ:

$5 \div (3 - 2 \sqrt{3} ) + 5 \div (3 + 2 \sqrt{3} ) \\ (15 - 10 \sqrt{3} + 15 + 10 \sqrt{3} ) \div (3 - 2 \sqrt{3} ) \times (3 + 2 \sqrt{3} ) = \\ = 30 \div (3 ^{2} - (2 \sqrt{3})^{2} ) = \\ = 30 \div ( - 3) = - 10$