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National
Easy
Algebra
7–9
Expand
(
x
+
3
)
2
(x + 3)^2
(
x
+
3
)
2
.
Desenvolve
(
x
+
3
)
2
(x + 3)^2
(
x
+
3
)
2
.
Answer options
A.
x
2
+
3
x
+
9
x^2 + 3x + 9
x
2
+
3
x
+
9
B.
x
2
+
6
x
+
6
x^2 + 6x + 6
x
2
+
6
x
+
6
C.
x
2
+
9
x^2 + 9
x
2
+
9
D.
x
2
+
6
x
+
9
x^2 + 6x + 9
x
2
+
6
x
+
9
Check Answer
Solution
Step 1 of 3
1.
Notable product:
(
a
+
b
)
2
=
a
2
+
2
a
b
+
b
2
(a + b)^2 = a^2 + 2ab + b^2
(
a
+
b
)
2
=
a
2
+
2
ab
+
b
2
Next step
Show full solution