Will mark brainliest if right! x² + 16x = 49. What values make an equivalent number sentence after completing the square?

64

Step-by-step explanation:

To complete the square

add (half the coefficient of the x - term) ² to both sides

x² + 16x + (8) ² = 49 + (8) ²

x² + 16x + 64 = 49 + 64 ← equivalent expression