Răspunsuri

2014-02-28T20:10:24+02:00
(2x-3y+1)(2x-3y+1)+(x+2y+3)(x+2y+3)=4x²-6xy+2x-6xy+9y²-3y+2x-3y+1+x²+2xy+3y+2xy+4y²+6y+3x+6y+9=....de aici le aduni tu intre ele :D
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