Question

write the following cubes in expanded form ​

Answer 1

2a( cube)- 3b(cube)-3ab( a-b)

8a-27b-3a( square)b+ 3ab( square)

8a-27b-3a^b+3ab^

Answer 2

Answer:

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

So we can expand

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

$- 3(2a)(b)(2a - b) = > 8{a}^{3} - {b}^{3} -$

$6ab(a - b) = {(2a - b)}^{3} = >$

${(2a - b)}^{3} = 8 {a}^{3} - {b}^{3} - 12 {a}^{2} b + 6a {b}^{2}$