Question

Racionalize os denominadores
A)2
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√ 5

Answer 1

2/√5 .√5/√5 = 2√5/(√5)^2 =2√5/5

Answer 2

$\frac{2}{ \sqrt{5} } \times \frac{ \sqrt{5} }{ \sqrt{5} } = \frac{2 \sqrt{5} }{( \sqrt{5) ^{2} } } = \frac{2 \sqrt{5} }{5}$