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Mathematics 20 Online
OpenStudy (anonymous):

multiply √5(9-5√5)

myininaya (myininaya):

\[\sqrt{5}(9-5\sqrt{5})=\sqrt{5} \cdot 9 - \sqrt{5} \cdot 5 \sqrt{5}\]

myininaya (myininaya):

i used the distributive property here

myininaya (myininaya):

\[9 \sqrt{5}- 5 \sqrt{5} \sqrt{5}\] i used the commutative property here

myininaya (myininaya):

\[9 \sqrt{5}-5 (5)\] since sqrt(5) sqrt(5)=5

OpenStudy (anonymous):

\[ \sqrt{5}(9-5\sqrt{5})=\sqrt{5} \cdot 9 - \sqrt{5} \cdot 5 \sqrt{5} = 9 \sqrt{5} -25 \]

myininaya (myininaya):

\[9\sqrt{5}-25 \] since 5*5=25

OpenStudy (anonymous):

thanks again

myininaya (myininaya):

np :)

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