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This is as far as I got can someone please explain how to do this I'm really confused

This is as far as I got can someone please explain how to do this I'm really confused-example-1
User Scoota P
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1 Answer

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(2 +- sqrt(2))/2 is the answer. -(-4) = 4 and (-4)^2 -4(2)1 is 8. Sqrt of 8 can be rewritten as 2 times sqrt(2) since 4 and 2 have common multiples, the answer is simplified to (2 +- sqrt(2))/2
User MII
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