<PRE><B>Question 231214</B>
1) 5z-4z-12 ( I did q + 5p but I can&#39;t seem to come up with the right solution) 
z-12 ans.
----------------------------
2) 3x^2 + 19xy + 20y^2 
(3x+4y)(x+5y) ans.
---------------------------
3) 2w + wx + xt + 2t 
w(2+x)+t(2+x)
(w+t)(2+x) ans.
-------------------------------
4) 
4w+5u+5
4w-6u+4 multiply
---------
16w^2+20wu+20w-24wu-30u^2-30u+16w+20u+20
16w^2-4wu+36w-10u-30u^2+20 ans.


</PRE>