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Byju's Answer
Standard XII
Mathematics
Inverse of a Matrix
Find the miss...
Question
Find the missing term in the following expression to make each a perfect square.
4
x
2
−
□
+
49
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Solution
4
x
2
−
+
49
(
2
x
)
2
−
2
×
2
x
×
7
–
––––––––––
–
+
(
−
7
)
2
(
2
x
)
2
−
28
x
+
49
(
2
x
−
7
)
2
Using the identity
(
a
−
b
)
2
=
a
2
−
2
a
b
+
b
2
Hence the missing term is
28
x
.
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