Question

racionalizar os denominadores:
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Answer 1

$\frac{2}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } = \frac{2 \sqrt{3} }{3}$

$\frac{ \sqrt{2} }{ \sqrt{2} + 1} \times \frac{ \sqrt{2 } - 1}{ \sqrt{2} - 1 } = \frac{2 - \sqrt{2} }{2 - 1} = 2 - \sqrt{2}$

$\frac{4}{2 \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } = \frac{4 \sqrt{2} }{4} = \sqrt{2}$

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