Verify the second and third terms in the following expression

Explanation

That is false. 

Since subtraction can be written as addition of the opposite, the expression  a² - 3a - 9 has three terms

a² - 3a - 9 =                 a²        +          (-3a)        +             (-9)

                            (1st Term)           (2nd Term)            (3rd Term)

So second and third terms are -3a and -9 subsequently