GCSE Maths Practice: rearranging-formulae

\( \text{Rearrange for } x:\ y = nx^2 + mx + k \)

Choose one option:

\( x = \tfrac{-m \pm \sqrt{m^2 + 4n(y - k)}}{2n} \) \( x = \tfrac{-m \pm \sqrt{m^2 - 4n(y - k)}}{2n} \) \( x = \tfrac{m \pm \sqrt{m^2 + 4n(y - k)}}{2n} \)