Please see link below:

http://oi48.tinypic.com/flgfpy.jpg

I know how to get 3.1. a & b but not c and d.

I also need help with questions 3.2. , 3.6. , 3.7. and 3.8.

I can do the rest myself

3.1.

(x+1) (x) (x-3)

=x^2 + x +x^2 -3x

= 2x^2 - 2x

a=2 & b= -2

That's all I can get.