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Algebra 21 Online
OpenStudy (anonymous):

simplify by rationalizing the denominator

OpenStudy (anonymous):

\[\frac{ 2\sqrt{108} }{ \sqrt{180y} }\]

OpenStudy (anonymous):

i will help

OpenStudy (anonymous):

\[\frac{ 2\sqrt{108} }{ \sqrt{180y} } \times \frac{\sqrt{180y} }{\sqrt{180y} } = \]

OpenStudy (anonymous):

wait back up a bit lets simplify the radicals first

OpenStudy (anonymous):

\[\frac{ 2\sqrt{108} }{ \sqrt{180y} } = \frac{ 2\sqrt{(36)(3)} }{ \sqrt{(36)(5)y} } = \frac{ (2)(6) \sqrt{3} }{ 6 \sqrt{5y} } =\frac{ 12 \sqrt{3} }{ 6 \sqrt{5y} } =\frac{ 2 \sqrt{3} }{ \sqrt{5y} } \]

OpenStudy (anonymous):

now me can easily rationalize this denominator

OpenStudy (anonymous):

im lost

OpenStudy (anonymous):

\[\frac{ 2 \sqrt{3} }{ \sqrt{5y} } = \frac{ 2 \sqrt{3} }{ \sqrt{5y} } \times \frac{ \sqrt{5y} }{ 5y} } = \frac{ 2 \sqrt{15y} }{ \sqrt{25y} \]

OpenStudy (anonymous):

do you know how to simplify radicals?

OpenStudy (anonymous):

nope

OpenStudy (anonymous):

no

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