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Mathematics 11 Online
OpenStudy (anonymous):

I got marked off on this question on my math test for not simplifying the radical in my final step of the problem. So how would I simplify this more? x=2+-sqrt-8

OpenStudy (cwrw238):

sqrt8 = sqrt4*sqrt2 = 2 sqrt2 sqrt -8 = 2i sqrt2 2+-sqrt-8 = 2 +/- 2i sqrt2 you can also factor this ti get 2(1 +/- sqrt2)

OpenStudy (cwrw238):

* thats 2(1 +/- i sqrt2)

OpenStudy (anonymous):

Ohhh I see, thanks!

OpenStudy (cwrw238):

yw

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