Question

Numarul (√20/3-1/√5)(10/√125+12/√180)este
Va rog raspunsul corect este 2
(mi-e nu imi da 2)

Answer 1

[tex](\frac{^{5)}2\sqrt{5}}{3}-\frac{^{3)}\sqrt{5}}{5})(\frac{10}{5\sqrt{5}}+\frac{12}{6\sqrt{5}})=\\ \frac{7\sqrt{5}}{15}\cdot(\frac{2}{\sqrt{5}}+\frac{2}{\sqrt{5}})=\\ \frac{7\sqrt{5}}{15}\cdot\frac{4}{\sqrt{5}}=\\ \frac{28}{15} [/tex]

Answer 2

=(2√5/3-√5/5)(10/5√5+12/6√5)=
=(10√5/15-3√5/15)(2/√5+2/√5)=
=7√5/15*4/√5=
=7*4/15=
=28/15