SOLUTION: how do i simplify.. 6 radical 40 - 2 radical 90 - 3 radical 160

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Question 351996: how do i simplify..
6 radical 40 - 2 radical 90 - 3 radical 160
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
6sqrt(40)-2sqrt(90)-3sqrt(160)
=6sqrt(4*10)-2sqrt(9*10)-3sqrt(16*10)
=12sqrt(10)-6sqrt(10)-12sqrt(10)
=4sqrt(10)
.
Ed