Question

How do you solve `4x^2 + 4x + 1 = 49` by completing the square?

Answer 1

y = 4x^2 + 4x + 1 = 49

`(2x + 1)^2 = 49`

`(2x + 1) = +-7` -> `2x = -1 +- 7 -> x = -1/2 +- 7/2`