Respuesta :

[tex]-2x^2+8x-9+4x+7x^2+2[/tex]

To simliy combine like terms

Like terms are terms whose variables and their exponents are the same.

[tex]\begin{gathered} =-2x^2+7x^2+8x+4x-9+2 \\ =5x^2+12x-7 \end{gathered}[/tex]Answer: A

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