Solving Quadratic Equations by Completing the Square

The video tutorial explains how to solve quadratic equations of the form x^2 + bx + c = 0 using the method of completing the square. It covers the steps to move constant terms, add numbers to complete the square, and factor the equation. The tutorial also addresses how to handle equations with imaginary solutions by simplifying square roots of negative numbers using the imaginary unit 'i'. Finally, it demonstrates solving equations with imaginary solutions through a detailed example.

What is the significance of the plus-minus sign when taking the square root of both sides?

Describe how to solve an equation that has imaginary solutions.