Math, asked by kuniyaldeepa27, 1 month ago

if a+b+c = 20 and a²+b²+c²=152. Find the value of ab+bc+ca.

Answers

Answered by gopakumar4

4

Answer:

(A+b+c)² = a²+b²+c²+2ab+2bc+2 ca

20² = 152 + 2ab+2bc+2ca

400 - 152 =2(ab+bc+ca)

248/2 = ab +bc+ca

148 =ab+bc+ca

Hope it helps

Thankyou

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