Respuesta :
					                   (y-4) (y-3) 
you look at 12 and see what two factors of 12 add up to -7 and -4 times -3 is 12 and -4+-3 = -7
					                
					             you look at 12 and see what two factors of 12 add up to -7 and -4 times -3 is 12 and -4+-3 = -7
					                   Ans= (y-3)(y-4). 
Consider the form
x
2
+
b
x
+
c
x
2
+
b
x
+
c
. Find a pair of integers whose product is
c
c
and whose sum is
b
b
. In this case, whose product is
12
12
and whose sum is
−
7
-
7
.
−
4
,
−
3
					                
					                
					             Consider the form
x
2
+
b
x
+
c
x
2
+
b
x
+
c
. Find a pair of integers whose product is
c
c
and whose sum is
b
b
. In this case, whose product is
12
12
and whose sum is
−
7
-
7
.
−
4
,
−
3
