Question

Factorise 729a³-216³​

Answer 1

Answer:

$9a \times 9a \times 9a - 6 \times 6 \times 6$

Answer 2

Step-by-step explanation:

729 is cube of 9

216 is a cube of 6

$\: \: = 729 {a}^{3} - {216}^{3} \\ = {9}^{3} {a}^{3} - {6}^{3} \: \: \: \: \: \: \\ = \sqrt[3]{ {9}^{3} {a}^{3} \: - {6}^{3} } \\ = \sqrt[3]{9a - 6} \: \: \: \: \: \: \: \:$