 | Jacob William Albert Young, Lambert Lincoln Jackson - 1913 - 312 páginas
...negatively. Thus, V? = + 2 or — 2 is written V4 = ± 2. Also, Va2 = + a or — a is written Va2 = ± a. The positive square root of a number is called the principal square root. ORAL EXERCISES State the two square roots of each number : 1. 25. 5. 225. 9. 144. 13. 49 a2ж4. 2.... | |
 | Florian Cajori - 1916 - 236 páginas
...equal to — — — Since а~2 = — i a*c oa it follows that а?c PRINCIPAL ROOTS 38. Since 6 • 6 = + 36, and (- 6)(— 6) = + 36, it follows that...we mean the negative square root. Thus, V36 or (36) k stands for + 6, - -ч/36 or — (36)^ stands for — 6, It can be shown that there are 3 different... | |
 | Karen Lurie - 2003 - 235 páginas
...holders. The answer is 248,300. SQUARE ROOTS If x2 = y , then x is the square root of y and ^ y = x. A positive square root of a number is called the principal square root. The radical sign, V , indicates the principal square root. A negative sign outside the radical sign... | |
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The positive square root of a number is called the principal square root. 