Question

show that l^2m(l-m^2)+lm^2(4lm-2l^2)-l^2m(l-2m)=3l^2m^2​

Answer 1

Answer:

l

2

m

2

n−lm

2

n

2

—l

2

mn

2

mn(l

2

m−lmn−l

2

n)

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Answer 2

Answer:

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