Question: How to factor 4 - 2a and (2x^2 - 2x + sqrt(2))^2 ?

Hi all

I have 4 - 2a and (2x^2 - 2x + sqrt(2))^2. How to factor it become 2(2-a) and 2(sqrt(2)x^2 - sqrt(2)x + 1)^2 ?

Thanks you very much.

 

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