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Lm (51 + m) + 21² (m - 3) + 6L (m² +L) ​
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Lm (51 + m) + 21² (m - 3) + 6L (m² +L) ​

User VsMaX
by
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2 Answers

4 votes

Answer:

YOU GOT GOOGLE

Explanation:

GOOGLE!!

User Wijnand
by
5.9k points
4 votes

Answer:

Explanation:

Given :

l + m + n = 9

l²+ m² + n²= 31

l + m + n = 9

On squaring both sides

(l + m + n)²= 9²

(l²+m²+n²+2(lm+mn+nl) = 81

31 +2(lm+mn+nl) = 81

2(lm+mn+nl) = 81 - 31

2(lm+mn+nl) = 50

(lm+mn+nl) = 50/2

(lm+mn+nl) = 25

Hence, the value of (lm+mn+nl) = 25

User Chris Hamilton
by
5.3k points
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