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Calculati:
9x la patrat + 24x -33=
5x la patrat +8x +3=


Răspuns :

9x²+24x-33=9x²+24x+16-49=(3x+4)²-49=(3x+4-7)(3x+4+7) =( 3x-3)(3x+11)

5x²+8x+3=5x²+5x+3x+3=5x(x+1)+3(x+1)=(x+1)(5x+3)