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Byju's Answer
Standard VII
Mathematics
(a + b)^2 Expansion and Visualisation
State true or...
Question
State true or false:
If
2
x
3
y
=
3
y
4
z
, then
4
x
2
+
9
y
2
+
16
z
2
=
(
2
x
ā
3
y
+
4
z
)
(
2
x
+
3
y
+
4
z
)
A
True
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B
False
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Solution
The correct option is
A
True
2
x
3
y
=
3
y
4
z
=
>
8
x
z
9
y
2
=
1
=
>
8
x
z
=
9
y
2
------- (i)
L.H.S
=
4
x
2
+
9
y
2
+
16
z
2
=
4
x
2
+
8
x
z
+
16
z
2
(from i)
=
(
2
x
)
2
+
2
(
2
x
)
(
4
z
)
+
(
4
z
)
2
−
8
x
z
=
(
2
x
+
4
z
)
2
−
9
y
2
(from i)
=
(
2
x
+
4
z
)
2
−
(
3
y
)
2
Using,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
=
(
2
x
+
3
y
+
4
z
)
(
2
x
−
3
y
+
4
z
)
=R.H.S
Suggest Corrections
1
Similar questions
Q.
State True or False.
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y
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16
z
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If
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2
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16
z
2
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(
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x
−
3
y
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z
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z
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State True or False.
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Q.
Factorise the following:
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−
3
y
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3
+
(
4
z
−
2
x
)
3
+
(
3
y
−
4
z
)
3
Q.
Find the distance between the planes
2
x
+
3
y
+
4
z
=
7
and
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x
+
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