Question

please solve this question ​

Answer 1

${a}^{3} - {9a}^{2} + a - 9 \\ \\ {a}^{2} (a - 9) + 1(a - 9) \\ \\ (a - 9)( {a}^{2} + 1)$

Answer 2

${a}^{3} - 9 {a}^{2} + a - 9 \\ \\ = {a}^{2} (a - 9) + (a - 9) \\ \\ ( {a}^{2} +1)(a - 9)$

hope it helps.