(
x
+
3
)
²
=
x²
+
____________________
+
9
(
x
?
4
)
²
=
x²
?
____________________
+
____________________
(
x²
+
2
)
²
=
____________________
?
+
____________________
+
4
(
x³
?
3
)
²
=
____________________
?
?
6x³
+
____________________
(
x
+
2y
)
²
=
x²
+
____________________
+
4y²
(
5x
?
y
)
²
=
____________________
?
____________________
+
y²
(
3x
+
2y
)
²
=
9x²
?
____________________
+
____________________
(
2x
?
12y
)
²
=
4x²
?
48xy
+
____________________
(
-
10x
+
3y
)
²
=
____________________
?
____________________
+
9y²
(
4x²
+
7y
?
)
²
=
____________________
?
+
56x²y
?
+
____________________
?
