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Byju's Answer
Standard VII
Mathematics
(a + b)^2 Expansion and Visualisation
3(2x+ 1)(4x+ ...
Question
3
(
2
x
+
1
)
(
4
x
+
1
)
Which of the following is equivalent to the expression above?
A
45
x
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B
24
x
2
+
3
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C
24
x
2
+
18
x
+
3
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D
18
x
2
+
6
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Solution
The correct option is
C
24
x
2
+
18
x
+
3
The value of
3
(
2
x
+
1
)
(
4
x
+
1
)
=
3
(
8
x
2
+
2
x
+
4
x
+
1
)
=
3
(
8
x
2
+
6
x
+
1
)
=
24
x
2
+
18
x
+
3
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