Add the following l²+m²,m²+n²,n²+l²,2lm+2nl
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Step-by-step explanation:
l² + m² + m² + n² + n² + l² + 2lm + 2nl
= ( l² + l² ) + ( m² + m² ) + ( n² + n² ) + 2lm + 2nl
= 2l² + 2m² + 2n² + 2lm + 2nl or
= 2 ( l² + m² + n² + lm + ln ) is the answer.
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