Question

va rog frumosssssssss​

Answer 1

Raspuns :

$x=\frac{(\sqrt{10}+2)(\sqrt{10}-2)}{\sqrt{6}} = \frac{10-4}{\sqrt{6}} = \frac{6}{\sqrt{6}} = \frac{6\sqrt{6}}{6}=\sqrt{6}$

Formule folosite :

• $\frac{a}{b} =\frac{c}{d} => d=\frac{b*c}{a}$, daca a,b,c,d sunt nenule

• $a^{2} -b^{2} =(a-b)(a+b)$