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Descompuneti in factori folosind metoda factorului comun:
a)(5x-3)(4x+1)-6x+3)(3-5x)
b)(x+1)(2x-3)+( +1)2 •[adica x+1 la a doua]•
c)(x+3)(5x-4)-(x+3)2 •[adica x+3 la a doua]•