Question 730939
5	z^2 +	11	z+	6										
5	z^2 +	6	z+	5	z+	6								
z 	( 	5	z 	+	6	)+	1	(	5	z 	+	6	)
		( 	5	z 	+	6	)(	1	z 	+	1	)