How do you multiply $(2sqrt21)(3sqrt6)$ ?

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Answer 1 · 2015-06-19T18:25:59

$(2sqrt(21))(3sqrt(6)) = 6sqrt(21*6) = 6sqrt(9*14) = 18sqrt(14)$

$(2sqrt(21))(3sqrt(6))$

$= 2*sqrt(21)*3*sqrt(6)$

$=2*3*sqrt(21)*sqrt(6)$

$=6*sqrt(21*6)$

$=6*sqrt(9*14)$

$=6*sqrt(9)*sqrt(14)$

$=6*3*sqrt(14)$

$=18sqrt(14)$

If $a, b > 0$ then $sqrt(ab) = sqrt(a)sqrt(b)$

How do you multiply (2sqrt21)(3sqrt6)(2sqrt21)(3sqrt6)?