SOLUTION: -5 √ 162 -4√32 +10√98 please solve

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Question 245604: -5 √ 162 -4√32 +10√98 please solve
Answer by checkley77(12844) About Me  (Show Source):
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-5 √ 162 -4√32 +10√98
-5sqrt(81*2)-4sqrt(16*2)+10(49*2)
-5*9sqrt2-4*4sqrt2+10*7sqrt2
-45sqrt2-16sqrt2+70sqrt2
9sqrt2 ans.