Question

find the cube of (2a-3b)cube​

Answer 1

Answer:

2a−3b)

3

=(2a)

3

+(−3b)

3

+3(2a)(−3b)(2a−3b)

=8a

3

−27b

3

−18ab(2a−3b)

=8a

3

−27b

3

−36a

2

b+54ab

Answer 2

using identity : (a-b)3 = a3 - b3 - 3ab(a-b)

(2a - 3b)3

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

2a + 18ab * 2b

+ 36 ab2

= : (2a)3 - (3b)3 -

= 8a3 - 27b3 - 18ab *

= 8a3 - 27b3 - 36 a2b...

Hope it's helpful for you....