Square Root

A square root is a number that, when multiplied by itself, gives you the original number. For example, the square root of 9 is 3, because 3 × 3 = 9. It's like asking, "What number can I square to get this value?" Square roots are useful in various math and real-world applications, such as calculating distances or understanding proportions. Every positive number has two square roots: one positive and one negative, since both multiply to give the original number. The square root symbol is √, so √9 = 3.