Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) `|[a+b,a+2b,a+3b],[a+2b,a+3b,a+4b],[a+4b,a+5b,a+6b]|`= - Sarthaks eConnect

`|[a+b,a+2b,a+3b],[a+2b,a+3b,a+4b],[a+4b,a+5b,a+6b]|`=

`a^2+b^2+c^2-3abc`

3ab

3a+5b