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K=x²+2y-y²+3x+5x²+6y²+5y
ordenamos....
K=x²+3x+5x²+2y-y²+5y
K= 6x²+3x+7y-y²
factorizando...
K=3x(2x+1)+y(7-y)
saludos tu amiga karla.....