Question

(a+b) (a+b) (a+b) +(2a-2b)(2a-2b)(2a-2b)​

Answer 1

Answer:

a=2b=−2∴2a

2b+2ab 2 +ab

=2(2) 2 (−2)+2(2)(−2) 2 +(2)(−2)

=−16+16−4

=−4

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

Given that,

( a + b ) ( a + b ) ( a + b ) + ( 2a - 2b ) ( 2a - 2b ) ( 2a - 2b )

= ( a + b )³ + ( 2a - 2b )³

= a³ + b³ + 3a²b + 3ab² + ( 2a )³ - ( 2b )³ - 3 ( 2a )² ( 2b ) + 3 ( 2a ) ( 2b )²

= a³ + b³ + 3a²b + 3ab² + 8a³ - 8b³ - 3 ( 4a² ) ( 2b ) + 3 ( 2a ) ( 4b² )

= a³ + b³ + 3a²b + 3ab² + 8a³ - 8b³ - 24a²b + 24ab²

= ( a³ + 8a³ ) + ( b³ - 8b³ ) + ( 3a²b - 24a²b ) + ( 3ab² + 24ab² ) (∵ like terms adding )

= 9a³ + ( - 7b³ ) + ( - 21a²b ) + ( 27ab² )

= 9a³ - 7b³ - 21a²b + 21ab² is the answer. ( ∵ + × - = - )