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(2x − 1)(x + 3) − x² + 3x + 5
2x² + 6x - x - 3 - x² + 3x + 5
2x² - x² + 6x + 3x - x + 5 - 3
x² + 9x - x + 2
x² + 8x + 2
Respuesta.
x² + 8x + 2
2x² + 6x - x - 3 - x² + 3x + 5
2x² - x² + 6x + 3x - x + 5 - 3
x² + 8x + 2