Answer: A 27√2
Explanation:
You first need to simplify the roots
3√50+4√18
=
break up what is under the root into factors of 50 and 18, make perfect squares is best.
For the first term, You can take the √25 =5 so 5 comes out and is multiplied by the 3 but the 2 stays unders the root
For the second term, you can take √9 =3 so 3 comes out and is multipled by the 4 but the 2 stays under the root.
=5*3√2 +4*3√2
=15√2 +12√2 now they are same terms so you can add
=27√2