Question

Помогите решить уровнение. ​

Answer 1

$x^{2} =(sqrt{6}+2sqrt{5})^{2}-4sqrt{30}\\x^{2}=(sqrt{6})^{2}+2*sqrt{6}*2sqrt{5}+(2sqrt{5})^{2}-4sqrt{30}\\x^{2}=6+4sqrt{30}+20-4sqrt{30}\\x^{2} =26\\x_{1}=-sqrt{26} \\x_{2}=sqrt{26}$