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Cuadrado de un número = x²
x² -2x = 24
x² -2x -24 = 0
(x -6) (x +4) = 0
x -6 = 0 x +4 = 0
x = 6 x = -4
El número puede ser el 6 ó el -4
x al cuadrado - menos - 2x = 24