Question

raționalizand fracția 10 supra ✓20 se obține​

Answer 1

Răspuns:

10/√20=

10/2√5=

10·√5/2·5=

10√5/10= se reduce 10

√5

Answer 2

$\it \sqrt{20}=\sqrt{4\cdot5}=2\sqrt5\\ \\ \\ \dfrac{10}{\sqrt{20}}=\dfrac{\ \ 10^{(2}}{2\sqrt5}=\dfrac{^{\sqrt5)}5}{\ \ \sqrt5}=\dfrac{5\sqrt5}{5}=\sqrt5$