<PRE><B>Question 539834</B>
3x2+7x+4
----------
3x+4

3x^2+3x+4x+4
-------------
3x+4

3x(x+1)+4(x+1)
--------------
3x+4
(3x+4)(x+1)
-----------
(3x+4)

= x+1 

the other side = x+1 ft</PRE>