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(x³ + y³) Factorizamos es suma de cubos x³+y³ =(x + y)(x²-xy +y²)
------------ =
( x +y)
(x + y)( x² -xy +y²)
---------------------------- Simplificamos ( x + y)
( x + y )
(x² -xy + y²)
Solucion. x³ + y³ ÷ ( x +y) = (x² - xy +y²)