Respuesta :

Answer:

C

Step-by-step explanation:

[tex]4x^{2} +6x-3-8x^{2} -2x-9[/tex]

Collect like terms:

[tex](4x^{2} -8x^{2} )+(6x-2x)+(-3+-9)[/tex]

[tex]-4x^{2} + 4x -12[/tex]

This matches with Option C

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