(
x
+
____________________
)
²
=
____________________
+
____________________
+
9
(
2a
+
____________________
)
²
=
____________________
+
4a
+
____________________
(
-
____________________
+
8
)
²
=
x²
?
16x
+
____________________
(
____________________
-
4
)
²
=
____________________
-
8x
+
____________________
(
____________________
-
x
)
(
____________________
+
x
)
=
25
-
____________________
(
-
m
-
____________________
)
(
-
m
+
____________________
)
=
____________________
-
a²b
²
