If a = 2 then the value of a³ + 27a² + 243a + 631 is -

Question: If a = 2 then the value of a³ + 27a² + 243a + 631 is -

Solution:
Given,
a = 2

Now,
a³ + 27a² + 243a + 631
= a³ + 3 . a² . 9 + 3 . a . 9² + 9³ - 98
= (a + 9)³ - 98
= (2 + 9)³ - 98
= 1331 - 98
= 1233