simplify:

Question

2sqrt50 - sqrt8

I am confused because of the 2 before the sqrt50

Answer 1

2 sqrt 50 = 2 sqrt (5*5*2) = 10 sqrt 2
sqrt 8 - sqrt (2*2*2) = 2 sqrt 2

10 sqrt 2 - 2 sqrt 2 =

Answer 2

is 8sqrt2 correct?

Answer 3

The 2 before the sqrt50 just means 2 times sqrt50
Since
sqrt50=5sqrt2
and
sqrt8=2sqrt2
2*5sqrt2-2sqrt2
=10sqrt2-2sqrt2
=8sqrt2

Answer 4

Yes, both right :)