5
x²
+
25
x
?
5
=
____________________
(
x²
+
____________________
x
?
____________________
)
27
x
+
9
y
?
3
xy
=
____________________
(
9
x
+
____________________
y
?
xy
)
12
x²
?
36
xy
+
18
y³
=
____________________
(
2
____________________
?
____________________
xy
+
____________________
y³
)
