Respuesta :

rdacoder

Answer: 9

Step-by-step explanation:

[tex]-3x^{2} -6x+c\\[/tex]

in order to do this find B. B = -6

divide -6 by 2 and then square that

[tex](\frac{-6}{2} )^{2}[/tex]

[tex]-3^{2}[/tex]

⇒ 9

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