Question

(За + 1)³+ (2а - 1) ³​

Answer 1

Step-by-step explanation:

Question

( 3a + 1)³ + (2a -1)³

Solution

Expand this (3a + 1)³

=> (3a)³ +( 1) + 3 × 3a × 1 (3a +1)

=> 27a³ + 1 + 9a ( 3a + 1)

=> 27a³ + 1 + 27a² + 9a

Then expand another one ( 2a - 1)³

=>( 2a)³ - (1)³ - 3 × 2a × 1 (2 a - 1)

=> 8a³ - 1 - 6a (2a - 1)

=> 8a³ - 1 - 12a² + 6a

A/q

( 3a + 1)³ + ( 2a- 1)³

=> (27a³ + 1 + 27a² + 9a) + (8a³ - 1 - 12a² + 6a)

=> 27a³ + 1 + 27a² + 9a + 8a³ - 1 - 12 a² + 6a

=> 35a³ + 15a² + 15a

Hope it helps you

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