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Byju's Answer
Standard VII
Mathematics
(x + a)(x +b)= x^2 + x(a+ b) + ab
a 2 - b 2 =a+...
Question
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
. Then factors of
1
+
2
a
b
−
(
a
2
+
b
2
)
are
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Solution
given,
1
+
2
a
b
−
(
a
2
+
b
2
)
=
1
+
2
a
b
−
a
2
−
b
2
=
1
−
(
a
2
+
b
2
−
2
a
b
)
=
1
−
(
a
−
b
)
2
=
(
1
)
2
−
(
a
−
b
)
2
=
(
1
+
a
−
b
)
(
1
−
a
+
b
)
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0
Similar questions
Q.
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
then factor of
1
+
2
a
b
−
(
a
2
+
b
2
)
are
Q.
State true or false:
If
A
=
[
2
−
1
0
1
]
and
B
=
[
1
0
−
1
−
1
]
,
then
(
A
+
B
)
2
=
A
2
+
A
B
+
B
A
+
B
2
=
A
2
+
2
A
B
+
B
2
Q.
Simplify
a
−
b
a
+
a
+
b
b
Q.
If A and B are square matrices of the same order, explain, why in general
(i) (A + B)
2
≠ A
2
+ 2AB + B
2
(ii) (A − B)
2
≠ A
2
− 2AB + B
2
(iii) (A + B) (A − B) ≠ A
2
− B
2
.
Q.
Factor(s) of
a
2
−
2
a
b
+
b
2
−
c
2
is/are
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