Question

find the cube roots of 729 step by step please ​

Answer 1

Adding the digits of 729, we get 7 + 2 + 9 = 18

Adding the digits of 729, we get 7 + 2 + 9 = 18As this digit sum is a multiple of 9, this tells us that 729 is a multiple of 9.

Adding the digits of 729, we get 7 + 2 + 9 = 18As this digit sum is a multiple of 9, this tells us that 729 is a multiple of 9.Dividing 729 by 9 gives us 81, which you should know is 9 multiplied by 9.

Adding the digits of 729, we get 7 + 2 + 9 = 18As this digit sum is a multiple of 9, this tells us that 729 is a multiple of 9.Dividing 729 by 9 gives us 81, which you should know is 9 multiplied by 9.Thus 729=9×9×9=93

Adding the digits of 729, we get 7 + 2 + 9 = 18As this digit sum is a multiple of 9, this tells us that 729 is a multiple of 9.Dividing 729 by 9 gives us 81, which you should know is 9 multiplied by 9.Thus 729=9×9×9=93 Hence, 9 is a cube root of 729