Question

expand each of the following by using suitable identities (2a-3b)³​

Answer 1

Step-by-step explanation:

(2a)cube-)(3b)cube-3*2a*3b(2a+3b)

8a cube - 27b cube - 18ab(2a+3b)

8a cube- 27b cube- 36a square b+ 54 a b square

Answer 2

Answer:

${(x - y)}^{3} = {x}^{3} - {y}^{3} - 3{x}^{2} y + 3x {y}^{2}$

${(2a - 3b)}^{3} = {(2a)}^{3} - {(3b)}^{3} - 3( {2a)}^{2} (3b) + 3(2a) {(3b)}^{2}$

$= 8 {a}^{3} - 27 {b}^{3} - 36 {a}^{2} b + 54a {b}^{2}$

Step-by-step explanation:

Hope it helps you out.....