Question 182229
 I need to know how to simplify the expression {{{3 sqrt 20 * 6 sqrt 5}}}. My teacher told me to do 18/100 and then 18*10, but I don't understand how that would work or why it would work. Maybe I misunderstood her?
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{{{3 sqrt 20 * 6 sqrt 5}}}
{{{sqrt(20) = sqrt(4)*sqrt(5) = 2sqrt(5)}}}
So it's:
{{{6sqrt(5)*2sqrt(5)}}}
= 36*5
= 180