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Byju's Answer
Standard IX
Mathematics
Addition of Polynomials
2 a+b3-a+3 b3
Question
(2a + b)
3
-
(a + 3b)
3
Open in App
Solution
We
have
2
a
+
b
3
-
a
+
3
b
3
=
2
a
+
b
-
a
+
3
b
2
a
+
b
2
+
2
a
+
b
a
+
3
b
+
a
+
3
b
2
=
a
-
2
b
4
a
2
+
b
2
+
4
a
b
+
2
a
2
+
7
a
b
+
3
b
2
+
a
2
+
9
b
2
+
6
a
b
=
a
-
2
b
4
a
2
+
2
a
2
+
a
2
+
b
2
+
3
b
2
+
9
b
2
+
4
a
b
+
7
a
b
+
6
a
b
=
a
-
2
b
7
a
2
+
13
b
2
+
17
a
b
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