Respuesta :

Answer:

4

Step-by-step explanation:

given

x² + 4x

To change it into a perfect square

add (half the coefficient of the x- term)² to x² + 4x

x² + 4x + ([tex]\frac{4}{2}[/tex])²

= x² + 4x + 2² = x² + 4x + 4

and x² + 4x + 4 = (x + 2)² ← a perfect square

Otras preguntas