Răspunsuri

2014-03-13T06:04:16+02:00
A)(x+1-2)(x+1+2)     b)(x+2y+2x-y)(x+2y-2x+y)    c)(3x+3x-2)(3x-3x+2)    d)(x+3y-1+x-2y+1)(x+3y-1-x+2y-1)
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