find the square of m+2n-3l
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Answer:
Given, (
3
2
m+
2
3
n)
2
Using (a+b)
2
=a
2
+2ab+b
2
we get,
=(
3
2
m)
2
+2[(
3
2
m)(
2
3
n)]+(
2
3
n)
2
=(
9
4
m
2
)+2mn+(
4
9
n
2
)
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