Visual explanation of completing the square in algebra, demonstrating perfect squares and how to adjust expressions to form them.
A diagram illustrating the concept of "Completing the Square" in algebra, showing how a quadratic expression can be rewritten as a perfect square, with a visual representation of x² + 4x + 4 = (x + 2)² and x² + 4x + 7 = (x + 2)² + 3 using colored tiles.