im taking an online class and i just wanted to check my answers with someone...

1. (21x to the fifth - 14x to the fourth - 35xsquared) =

7xsquared (3x to the third - 2xsquared - 5)

is that all? or is there more to the answer??

2. (q squared +6q +9) =

(q+3)(q+3)

3. (t squared - 16t +64)=

(t-8) squared

and i have more...