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March 1, 2015

March 1, 2015

Posted by **Sam** on Sunday, January 10, 2010 at 4:45pm.

If I have (2+/-Sqrt(8))/2

I know that x can either equal 2.41 or -0.14

However, my textbook is giving me the answers as 1+Sqrt(2) and 1-Sqrt(2)

I understand where the 1+/- comes from, but how are they getting Sqrt(2)?

I hope you can understamd what I mean. I'm confised, so I wasn't sure how to word the question correctly, but I hope you can see where I am having trouble.

Thank you.

- Math -
**Marth**, Sunday, January 10, 2010 at 5:51pmsqrt(8) can be simplified because 8 = 2^3

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