Respuesta :

Answer:

B = 9

Step-by-step explanation:

First, you need to simplify the expression,

[tex]3x^{2}+3x+7-11x^{2} +6x-3[/tex]

[tex]= (3-11)x^{2} +(3+6)x+7-3[/tex]

[tex]=-8x^{2} +9x+4[/tex] = [tex]Ax^{2} + Bx + C[/tex]

So, A = -8 , B = 9 , C = 4

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