Question

http://prntscr.com/a2sw7p help asap? please (:

Answer 1

@ParthKohli @imqwerty

Answer 2

@mathmale @aaronq

Answer 3

\(\large \color{black}{\begin{align}
& 2\sqrt{54}+5\sqrt{24} \hspace{.33em}\\~\\
& =2\sqrt{9\times 6}+5\sqrt{4\times 6} \hspace{.33em}\\~\\
& =2\sqrt{9}\times \sqrt{6}+5\sqrt{4}\times \sqrt{6} \hspace{.33em}\\~\\
& =(2\sqrt{9}+5\sqrt{4}) \sqrt{6} \hspace{.33em}\\~\\
& =(2\times 3+5\times 2) \sqrt{6} \hspace{.33em}\\~\\
& =(6+10) \sqrt{6} \hspace{.33em}\\~\\
& =(16) \sqrt{6} \hspace{.33em}\\~\\
\end{align}}\)