Question

$|4 - \sqrt{15} |$​

Answer 1

$\it \sqrt{15}<\sqrt{16} \Rightarrow \sqrt{15}<4|_{-4} \Rightarrow \sqrt{15}-4<0|_{\cdot(-1)} \Rightarrow -\sqrt{15}+4>0\Rightarrow \\ \\ \Rightarrow 4-\sqrt{15}>0 \Rightarrow |4-\sqrt{15}|=4-\sqrt{15}$