Simplicar las siguientes fracciones :[tex] \ frac{6( {x} ^ {2} - {y} ^ {2} )}{x - y} [ / tex][tex] \ frac{ {x} ^ {2} ( {x} ^ {2} - 9)}{x(x + 3)} [ / tex]?
Simplicar las siguientes fracciones : [tex] \ frac{6( {x} ^ {2} - {y} ^ {2} )}{x - y} [ / tex] [tex] \ frac{ {x} ^ {2} ( {x} ^ {2} - 9)}{x(x + 3)} [ / tex] .