Math, asked by krishnendusinha1970, 1 month ago

if a+b+c= 12 and a +b+d=64, find the value of ab + bc + ac.

Answers

Answered by mahak3922

1

Step-by-step explanation:

(a+b+c)²=a²+b²+c²+2ab+2bc+2ac=12²

=64+2(ab+bc+ac)=144

=2(ab+bc+ca)=144-64=80

=ab+bc+ca=80/2

=40

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