4x
-
2x²
=
____________________
(
2
-
____________________
)
16m²
-
x²
=
(
____________________
+
____________________
)
(
____________________
-
x
)
3x²
-
5x
-
2
=
(
____________________
+
1
)
(
____________________
-
____________________
)
x²
+
2x
-
15
=
(
____________________
+
____________________
)
(
x
-
____________________
)
4x²
-
12xy
+
9
y²
=
(
____________________
-
3y
)
____________________
am
-
bm
+
an
-
bn
=
(
____________________
+
____________________
)
(
____________________
-
____________________
)
