Question

If a+b+c=14 &a^2+b^2+c^2=96 then ab+bc+ca =?

Answer 1

I hope this answer help you

Answer 2

Given, a+b+c =14

(a+b+c) 2 =14*14

a2+b2+c2+2(ab+bc+ca)=196...

given that, a2+b2+c2=96

so, 2(ab+bc+ca)=196-96 = 100 ☺☺

So, ab+bc+ca=100/2=50 (answer)....

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