Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) The determinant `Delta =|[a,a+b,a+2b],[a+2b,a,a+b],[a+b,a+2b,a]|` equals - Sarthaks eConnect

The determinant `Delta =|[a,a+b,a+2b],[a+2b,a,a+b],[a+b,a+2b,a]|` equals

`9b^2(a+b)`

`9a^2(a+b)`

`9(a+b)^3`

`9ab(a+b)`