On the flip side of exponents and powers are roots and radicals. The square root of a number n is a number that you “square” (multiply by itself, or raise to the power of 2) to obtain n. 25 =4 (the square root of 4) because 2 3 2 (or 22) 5 4 The cube root of a number n is a number that you raise to the power of 3 (multiply by itself twice) to obtain n. You determine greater roots (for example, the “fourth root”) in the same way. Except for square roots, the radical sign will indicate the.
