Question

Don't know how to finish.





Simplify the expression and solve the equation. Show all calculations.
\[ \sqrt{28}+\sqrt{63}+\sqrt{175} \]


I think I have
\[2\sqrt{7}+5\]
But can't seem to finish.

Answer 1

 

$\displaystyle\\\sqrt{28}+\sqrt{63}+\sqrt{175}=\\\\=\sqrt{4\times7}+\sqrt{9\times7}+\sqrt{25\times7}=\\\\=2\sqrt{7}+3\sqrt{7}+5\sqrt{7}=\sqrt{7}(2+3+5)=\boxed{\bf10\sqrt{7}}$