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2*sqrt(12) + sqrt(27) = 2*sqrt(4*3) +sqrt(9*3)

= 2*sqrt(4)*sqrt(3) + sqrt(9)*sqrt(3)

= 2*2*sqrt(3) + 3*sqrt(3)

= 4*sqrt(3) + 3*sqrt(3)

= 7*sqrt(3)

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11y ago

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