contestada

Add: (3x2 - 5x + 6) + (9 - 8x - 4x2) A) 12x2 - 13x + 2 B) 7x2 + 3x - 3 C) 7x2 - 13x + 15 D) -x2 - 13x + 15

Respuesta :

xKelvin

Answer:

D

Step-by-step explanation:

So we have the expression:

[tex](3x^2-5x+6)+(9-8x-4x^2)[/tex]

Combine like terms:

[tex]=(3x^2-4x^2)+(-5x-8x)+(6+9)[/tex]

Add or subtract:

[tex]=(-1x^2)+(-13x)+(15)[/tex]

Simplify:

[tex]=-x^2-13x+15[/tex]

Our answer is D

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