The document discusses quadratic equations and square roots. It defines a square root as the number that, when multiplied by itself, equals the original number. Only positive integers have exact square roots, while other numbers result in non-terminating decimals. A quadratic equation is one that has the form ax^2 + bx + c = 0, where a is called the leading coefficient. Examples are provided of evaluating square roots, solving quadratic equations by finding the square roots of both sides, and evaluating expressions involving radicals.

3. Numbers that are never-ending decimals are called _______________________________.