Respuesta :

snog

Answer:

You should add 4 to both sides because that would make the left side a perfect square which is what you are intending to do when you complete the square.

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Answer:

4

Step-by-step explanation:

x² + 4x = 5

b = 4

We need to add (b/2)² to both sides to complete the square.

(4/2)² = 4

x² + 4x + 4 = 5 + 4

x² + 4x + 4 = 9

(x + 2)² = 9