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9-147=0
-138=0
x(x-5)=0
x²-5x=0
o sacas puntos críticos o simplificas
puntos críticos:
x(x-5)=0 ... x=0 y x=5
simplificar:
x²-5x=0
x²=5x
x=5
(-2x+1)(-3x+4)=0
6x²-8x-3x+4=0
6x²-11x+4=0
usas la fórmula general
o puntos cuando x=1/2 y x=4/3