First to answer correctly gets best answer?

Question

Solve:
6√30 + -4√20 + 9√45 + -6√30

Answer 1

6√30 + -4√20 + 9√45 + -6√30
-4√(4*5) +9√(9*5)
-8√5 + 27√5
19√5

Answer 2

I assume you mean simplify.

6√30 + -4√20 + 9√45 + -6√30

= (6√30 - 6√30) - 4√20 + 9√45

= 0 - 4√(4*5) + 9√(9*5)

= -4√(2²*5) + 9√(3²*5)

= -4*2√5 + 9*3√5

= -8√5 + 27√5

= 19√5