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Byju's Answer
Standard IX
Mathematics
Expansion of (a ± b ± c)²
Using x + a...
Question
Using
(
x
+
a
)
(
x
+
b
)
=
x
2
+
(
a
+
b
)
x
+
a
b
, find
103
×
104
A
10712
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B
10000
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C
11112
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D
10912
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Solution
The correct option is
A
10712
103
×
104
=
(
100
+
3
)
(
100
+
4
)
Using,
(
x
+
a
)
(
x
+
b
)
=
x
2
+
(
a
+
b
)
x
+
a
b
we get,
100
2
+
(
3
+
4
)
100
+
3
×
4
=
10000
+
700
+
12
=
10712
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0
Similar questions
Q.
Using
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x
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(
x
+
b
)
=
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2
+
(
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+
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,
find
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:
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Q.
Question 8(i)
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(
x
+
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)
=
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+
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a
+
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Q.
Using (x+a)(x+b)=
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x
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)
=
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2
+
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a
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)
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+
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b
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