Question

Помогите решить
√112/√7
$sqrt{13^{2}-5^{2} }$

Answer 1

$1) frac{ sqrt{112}}{ sqrt7}= sqrt{ frac{112}{7}}= sqrt{16}=4\2) sqrt{13^2-5^2}= sqrt{(13-5)(13+5)}= sqrt{8*18}= sqrt{8*2*9}=4*3=12$