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27 September, 10:53

2√7 times 3 √21 simply

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  1. 27 September, 11:17
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    21=3*7

    (2√7) (3√ (3*7) = 6√ (3*7²) = 6*7 (√3) = 42√3

    Answer: (2√7) (3√21) = 42√3
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