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Descompunti in factori a)(x^2+6x+9)-(y^2-4y+4)
B)(x^2-2x+1)-4y^2


Răspuns :

a)(x^2+6x+9)-(y^2-4y+4)=(x+3)^2-(y-2)^2=(x+3+y-2)(x+3-y+2)=(x+y+1)(x-y+5)
B)(x^2-2x+1)-4y^2=(x-1)^2-4y^2=()(x-1+2y)(x-1-2y)