How do you simplify #3sqrt5-5sqrt+9sqrt5#?

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Answer 1 · 2017-10-29T13:59:53

#-12sqrt5#

#3sqrt5-5sqrt+9sqrt5#

#:.=3sqrt5-5sqrt(3*3)sqrt5#

#sqrt3*sqrt3=3#

#:.=3sqrt5-5xx3sqrt5#

#:.=3sqrt5-15sqrt5#

#:.=sqrt5(3-15)#

#:.=-12sqrt5#