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kupik [55]
4 years ago
6

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

Mathematics
2 answers:
REY [17]4 years ago
5 0

Answer:

YOU GOT GOOGLE

Step-by-step explanation:

GOOGLE!!

Fofino [41]4 years ago
4 0

Answer:

Step-by-step 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

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