Question

please answer this question​

Answer 1

Answer:

iv) 64a3 - 27 b3 - 144a2b + 10 7 ab2

Answer 2

Answer:

$(iii) \: 27 - 125 {a}^{3} - 135a^{2} + 225 {a}^{2} \\ = {3}^{3} - {(5a)}^{3} - 3(3)^{2} + 3 \times 3 {(5a)}^{2} \\ = {(3 - 5a)}^{3} \\ = (3 - 5a)(3 - 5a)(3 - 5a)$

$(iv) \: \: 64 {a}^{3} - 27 {b}^{3} - 144 {a}^{2} b + 108 {ab}^{2} \\ = {(4a)}^{3}-{(3b)}^{3} - 3 {(4a)}^{2}(3b) + 3(4a) {(3b)}^{2} \\ = {(4a - 3b)}^{3} \\ =(4a - 3b)(4a - 3b)(4a - 3b)$