Respuesta:
1.x²-3x+5+(2x²-7x-4)
x²-3x-5+(5x-4)
x²-3x-5+5x-4
x²-3x-5x+5-4
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Respuesta:
1.x²-3x+5+(2x²-7x-4)
x²-3x-5+(5x-4)
x²-3x-5+5x-4
x²-3x-5x+5-4