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Sebastianmaftei
a fost răspuns

(2x-1) la patrat + 2(x-1) - x(x-3) = ?

Răspuns :

Lolo73
(2x-1)²+2(x-1)-x(x-3)
(4x²-2•2x•1+1²)+2x-2-x²+3x
4x²-4x+1+2x-2-x²+3x
3x²+x-1