Úloha ID 655 - 
Které z následujících částí výrazu patří do vztahu na místa vyznačená podtržením (v pořadí zleva doprava), aby platila uvedená rovnost?
Správná odpověď je: D
Lze si pomoci pozorováním, že napravo musí vyjít x2, což splňují odpovědi jen A) a D), a pak vyzkoušet: x2+3x+9/4=(0,5+x+1)2
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