Respuesta :
Simplifying:
2x^2 + (4x - 5x^2) + 9 - (6x + 3)
2x^2 + 4x - 5x^2 + 9 - 6x - 3
End Result: -3x^2-2x+6
2x^2 + (4x - 5x^2) + 9 - (6x + 3)
2x^2 + 4x - 5x^2 + 9 - 6x - 3
End Result: -3x^2-2x+6