How do you solve #v^2 - 4v - 30 = 0# by completing the square?
Step 1. Move the constant to the other side.
Step 2: -4 is the coefficient of the x-term
Halve it and square it and add to both sides.
Step 3; The left side can be written as a binomial squared.
Step 4. Find the square root of both sides.
Step 5. Do two calculations - once with the positive root and once with the negative root.