Math, asked by GurjeetSahu, 1 year ago

if a+b+c=12 and a^2+b^2+c^2=66,then find the value of ab+bc+ca

Answers

Answered by sujaymishra

5

apply (a+b+c)^2= a2 +b2 +c2+2(ab+bc+ac)
(144-66)/2= 44 is answer

GurjeetSahu: Sorry sir,option is 50,89,99,39

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