1. Wyrazenie (a-1)( do kwadratu)-(2a-1)(do kwadratu)+2(a-2)(a+2) jest rowne; a) -a (do kwadratu)-4 b)-2a(do kwadratu) -12 c) -a( do kwadratu)+ a-8 d) -a(ddo kwadratu)+2a-8 + jesli mozecie dzialanie:)
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