Multiplication of Polynomials
(
-2
x
2
-
8
x
+
4
)
(
5
x
2
+
8
x
-
5
)
=
(
-2
x
2
)
(
5
x
2
+
8
x
-
5
)
+
(
-8
x
)
(
5
x
2
+
8
x
-
5
)
+
(
4
)
(
5
x
2
+
8
x
-
5
)
=
(
-2
x
2
)
(
5
x
2
)
+
(
-2
x
2
)
(
8
x
)
+
(
-2
x
2
)
(
-5
)
+
(
-8
x
)
(
5
x
2
)
+
(
-8
x
)
(
8
x
)
+
(
-8
x
)
(
-5
)
+
(
4
)
(
5
x
2
)
+
(
4
)
(
8
x
)
+
(
4
)
(
-5
)
=
-10
x
4
-
16
x
3
+
10
x
2
-
40
x
3
-
64
x
2
+
40
x
+
20
x
2
+
32
x
-
20
=
(
-10
x
4
)
+
(
-16
x
3
-
40
x
3
)
+
(
10
x
2
-
64
x
2
+
20
x
2
)
+
(
40
x
+
32
x
)
+
(
-20
)
=
-10
x
4
-
56
x
3
-
34
x
2
+
72
x
-
20
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Copyright © Dayal D. Purohit, Ph.D.(Mathematics)