Respuesta :

Answer:

c

Step-by-step explanation:

distribute the parenthesis by - 1 and collect like terms

= 5x² + 9x + 3 - 6x² + 3x

= (5x² - 6x²) + (9x + 3x) + 3

= - x² + 12x + 3 → c


Answer:

c

Step-by-step explanation:

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