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OpenStudy (anonymous):
Simplify the radical expression: (2√7)² Please explain how you got it! Thanks!
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OpenStudy (chaise):
Simply square root everything in the brackets. You get: (2^2)(sqrt6)^2 Square root and two the power 2 cancel themselves out. You are left with 7x4 = 21 Hope this helped!
OpenStudy (chaise):
Oops, that should be sqrt 7 not 6 :)
OpenStudy (anonymous):
Yes 7 sqrt =D
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