Find the product using suitable identity.
(a + 3) (a - 3) (a^2 + 9)
Answers
Answered by
0
Step-by-step explanation:
As we know that
(a+b)(a−b)=a
2
−b
2
(x−
x
1
)(x+
x
1
)(x
2
+
x
2
1
)(x
4
+
x
4
1
)=(x
2
−
x
2
1
)(x
2
+
x
2
1
)(x
4
+
x
4
1
)
=((x
2
)
2
−(
x
2
1
)
2
)(x
4
+
x
4
1
)=(x
4
−
x
4
1
)(x
4
+
x
4
1
)=(x
4
)
2
−(
x
4
1
)
2
=x
8
−
x
8
1
Answered by
3
Answer:
(a+3)(a−3)(a2+9)
=((a+3)(a−3))(a2+9)
=((a+3)(a−3))(a2)+((a+3)(a−3))(9)
=a4−9a2+9a2−81
=a4−81
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