SOLUTION: SIMPLIFY THE SQUARE ROOT OF 28 -2*the square root of 7 + 6*the square root of 63

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Question 193961: SIMPLIFY
THE SQUARE ROOT OF 28 -2*the square root of 7 + 6*the square root of 63
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt (28) -2sqrt(7) +6sqrt(63)
sqrt (4*7) -2sqrt7 +6sqrt (9*7)
2sqrt7-2sqrt7+6*3sqrt7
18sqrt7,,,,,,,ANSWER
check
using calculator to calc both original and answer, both gave 47.62 ,, ok