SOLUTION: 5√(2)+6√(8)-7√(45)

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Question 203587: 5√(2)+6√(8)-7√(45)
Answer by RAY100(1637) About Me  (Show Source):
You can put this solution on YOUR website!
5sqrt2 +6sqrt8 - 7sqt45
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5 sqrt2 +6 sqrt(4*2) -7sqrt(9*5)
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5sqrt2 +6{sqrt4*sqrt2} -7{sqrt9*sqrt5}
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5sqrt2 +6*2sqrt2 -7*3sqrt5
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5sqrt2 +12sqrt2 -21sqrt5
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17sqrt2 -21sqrt5
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check
5sqrt2 +6sqrt8 -7sqrt45 = 17sqrt2 -21sqrt5
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7.07 + 16.97 -46.96 = 24.04 -46.96
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-22.92 = -22.92,,,,,,,ok