EXPLANATION :
From the problem, we have the radical expression :
[tex]\sqrt{36}+\sqrt{49}-\sqrt{16}[/tex]
Note that the given radicals are perfect squares :
36 = 6^2
49 = 7^2
16 = 4^2
Then :
[tex]\begin{gathered} \sqrt{6^2}+\sqrt{7^2}-\sqrt{4^2} \\ =6+7-4 \\ =9 \end{gathered}[/tex]
ANSWER :
The answer is 1 only
