Respuesta :

Answer:

Step-by-step explanation:

[tex]x^{2}[/tex] + 18x +c = 25+c

[tex]x^{2}[/tex] + 18x +[tex]9^{2}[/tex] =25+[tex]9^{2}[/tex]    (the c just cancels out and add [tex]9^{2}[/tex])

[tex](x+9)^{2}[/tex] -106 = 0

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