Question

How do you solve `n^2+4n-3=2` by completing the square?

Answer 1

Solve: `y = n^2 + 4n - 3 = 2.`

Explanation:

n^2 + 4n - 5 = 0
`n^2 + 4n = 5`
`n^2 + 4n + 4 = 5 + 4`
`(n + 2)^2 = 9 -> (n + 2) = +- 3`

`n = - 2 +- 3` -> n = 1 and n = - 5