Respuesta :

Answer:9

Step-by-Step-Explaination

(x+3)^2 + x^2 + 3^2 so we already have x^2, so we have 9, 3^2, left.

Answer:

9

Step-by-step explanation:

To complete the square

add ( half the coefficient of the x- term )² to x² - 6x

x² + 2(- 3)x + (- 3)²

= x² - 6x + 9

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