2m^2
+
3x
-
2
=
(
m
+
____________________
)
(
2m
-
____________________
)
20y^2
+
y
-
1
=
(
____________________
+
____________________
)
(
____________________
-
____________________
)
21x^2
+
11x
-
2
=
(
____________________
+
2
)
(
____________________
+
1
)
12x^2
-
7x
-
12
=
(
3x
-
____________________
)
(
4x
+
____________________
)
8a^2
-
14a
-
15
=
(
____________________
-
____________________
)
(
____________________
+
____________________
)
