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[tex] \frac{ x^{2}-4 y^{2} }{x+2y}[/tex] · [tex] \frac{2y}{x-2y} [/tex]

Răspuns :

(x-2y)(x+2y)/x+2y  *  2y/(x-2y)=(2xy-4y^2)/(x-2y)