Find the product of (x+1)(x+2) using identity
Answers
Answered by
3
Answer:
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
1
Answer:
(x + 1) (x + 2) = x² + 3x + 2.
Step-by-step explanation:
(x + 1) (x + 2).
By using 4th identity i.e.
(x + a) (x + b) = x² + (a + b)x + ab.
(x + 1) (x + 2).
x² + (1 + 2)x + (1)(2).
x² + x + 2x + 2.
x² + 3x + 2.
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