2007-12-23 23:05:59 · 30 answers · asked by onemillionjoes 2 in Science & Mathematics ➔ Mathematics
√81 = ±9
2007-12-23 23:07:55 · answer #1 · answered by Murtaza 6 · 3⤊ 3⤋
â81 = ± 9
2007-12-24 20:58:41 · answer #2 · answered by Como 7 · 0⤊ 0⤋
â81 = â 9 x 9
= 9
2007-12-24 03:46:35 · answer #3 · answered by An ESL Learner 7 · 0⤊ 0⤋
The square root of 81 is 9 given that 9*9= 81! If you are trying to calculate roots and sometimes encounter difficulties, you can rationalise them as smaller roots. For example: The square root of 81 = the square root of 9 * the square root of 9. The square root of 9 = 3 as 3*3=9. Therefore the square root of 81 = 9*9 =81! An alternative is -9 because - * - = + and thus -9*-9=+81!
2007-12-23 23:18:21 · answer #4 · answered by Anonymous · 0⤊ 2⤋
9
2007-12-25 17:54:14 · answer #5 · answered by Santiago 3 · 0⤊ 0⤋
9
2007-12-23 23:50:15 · answer #6 · answered by Nitin T F1 fan 5 · 0⤊ 1⤋
9
9*9=81
2007-12-24 03:43:08 · answer #7 · answered by ♫Lauryn♫ 3 · 0⤊ 0⤋
It is a rational number that can be factored. ( 9 X 9) =81.
9 is the square root. Using the "Associative Property" we can also say 3 X 3 X 3 X 3 = 81. There are no other factors.
I know, I used my calculator!
2007-12-24 06:48:42 · answer #8 · answered by gzlakewood@sbcglobal.net 4 · 0⤊ 0⤋
is 9 because 9 squared is 81.
2007-12-23 23:16:22 · answer #9 · answered by Genius 1 · 0⤊ 1⤋
9
2007-12-23 23:08:28 · answer #10 · answered by JEN 3 · 1⤊ 3⤋