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Sescompuneti in factori comuni:
x^2-7x+6=
X^2-9x+20=
x^2+8x+12=
x^2-15x+50=
X^2+x-12=
x^2-x-6=
x^2-x-20=
x^2-2x-35=
X^2-3x-4=
x^2+5x-14=
X^2-4x-21=