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blurbendy
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6Sqrt[72] = 6 * 6Sqrt[2]
Do you follow so far?

AdriM95
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Uh, I think so. So I would multiply 6 by 6...? I think...

blurbendy
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Yup!

AdriM95
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Oh, okay! Cool, thank you!

geerky42
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72 = 36·2 = 6²·2
So 6√72 = 6√(6²·2) = 6√6² ·√2 = 6·6√2 ···

AdriM95
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Thank you!

geerky42
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You are welcome.