Question

Помогите решить!!!!!!



$sqrt{29-4 sqrt{7} } - 2 sqrt{11-4 sqrt{7} } =$

Answer 1

$sqrt{29-4sqrt{7}}-2sqrt{11-4sqrt{7}}=\ sqrt{(2sqrt{7}-1)^2}-2sqrt{(2-sqrt{7})^2}=\ 2sqrt{7}-1-2(sqrt{7}-2)=2sqrt{7}-1-2sqrt{7}+4=3$ Ответ 3