l² + m² +2 lm-4
simplify the identity
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mid term factorization
(l+m)2=l2+m2+2lm
(l+m)2-(2)2 (a)2-(b)2=(a+b)×(a-b)
(l+m-2) (l+m+2)
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Answer:
(L+M+2)(L+M-2)
Step-by-step explanation:
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