Respuesta :

Answer:

[tex]\frac{1}{4}[/tex] b²

Step-by-step explanation:

To complete the square

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

x² + 2([tex]\frac{1}{2}[/tex] b )x + ([tex]\frac{1}{2}[/tex] b )²

= x² + bx + [tex]\frac{1}{4}[/tex] b²

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