The document contains solutions to several quadratic equations. It finds the solutions to equations of the form x^2 = c, 3x^2 - 48 = y, 4x^2 = 100, 2x^2 - 6 = 0, x^2 + 4 = 0, and 81x^2 - 5 = 20 by setting the equations equal to 0 and solving for x, determining whether solutions exist based on the discriminant, and finding the square roots of terms when appropriate.