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Mathematics 11 Online
OpenStudy (anonymous):

sdfalsdfasdf

hartnn (hartnn):

multiply and divide by the conjugate of denominator do you know what is conjugate of 4 +root 5 ?

OpenStudy (anonymous):

No

OpenStudy (anonymous):

Could I just multiply the top and bottom by sqroot 5?

hartnn (hartnn):

that won't help, try multiplying and dividing by 4 - root 5 which is conjugate of 4+root 5

OpenStudy (anonymous):

|dw:1383289245025:dw|

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