The Proposition $ F (2x-1) = 4x ^ 2-10x + a $, we need $ f (x) $ have to think of what $ x $ with $ 2x-1 $, it will become. $ X $ , we must replace the $ x $ with $ frac {x + 1} {2} $ (which is the inverse function of $ 2x-1 $ enough).
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