How do you simplify: 4 times the square root of 18?

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Answer 1 · 2015-07-26T20:03:32

$4sqrt 18=12sqrt2$

$4sqrt 18$

Factor $18$ into its prime factors.y

$4sqrt(2xx3xx3)$ =

$4sqrt((3xx3)xx2)$

$4sqrt(3^2xx2)$

Apply the rule $sqrt(a^2)=a$

$4xx3sqrt 2$

$12sqrt 2$