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OpenStudy (anonymous):
how do i simplify this expression? √20d+4√125d-3√45d
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OpenStudy (dumbcow):
simplify the radicals sqrt{20} = sqrt{4}sqrt{5} = 2sqrt{5} sqrt{125} = sqrt{25}sqrt{5} = 5sqrt{5} sqrt{45} = sqrt{9}sqrt{5} = 3sqrt{5}
OpenStudy (anonymous):
um. what?
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