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Mathematics 21 Online
OpenStudy (anonymous):

square root of 64?

OpenStudy (anonymous):

8

OpenStudy (anonymous):

+/-8

OpenStudy (anonymous):

can somebody help me with the problem thats attached below?

OpenStudy (anonymous):

8

OpenStudy (anonymous):

\[(\sqrt{5}-2)(3+\sqrt{5})/5-\sqrt{5}=3\sqrt{5}+5-6-2\sqrt{5}/5-\sqrt{5}\] =\[-1-\sqrt{5}/5-\sqrt{5}=(-1-\sqrt{5})(5+\sqrt{5})/25-5\] =\[-5-\sqrt{5}-5\sqrt{5}-5/20=-10-6\sqrt{5}/20\] \[=-5-3\sqrt{5}/10\]

OpenStudy (anonymous):

thank you mehreen

OpenStudy (anonymous):

u r welcm

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