F^2(x)=2x^2-1

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Solution for F^2(x)=2x^2-1 equation: 



^2(F)=2F^2-1

We move all terms to the left:

^2(F)-(2F^2-1)=0

We get rid of parentheses

-2F^2+^2F+1=0

We move all terms containing F to the left, all other terms to the right

-2F^2+^2F=-1

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