Hence, the correct answer is: C) (x - 6)^2 = 45
Further explanation:
Given equation is:
[tex]x^2-12x-9=0[/tex]
We will move the constant term on other side of the equation
[tex]x^2-12x=9[/tex]
To complete the square, we will take the coefficient of x and divide it by 2, as we already know that one term is x.
[tex]\frac{12}{2}=6[/tex]
So, adding (6)^2 on both sides
[tex](x)^2-2.x.6+(6)^2=9+(6)^2\\(x-6)^2=9+36\\(x-6)^2=45[/tex]
Hence, the correct answer is: C) (x - 6)^2 = 45
Keywords: Quadratic Equation, Solution of equation
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