if a+b+c=9 and ab+bc+ca=23 then a square + b square + c squarE =

Asked by RUDRA YADAV | 15th Sep, 2013, 08:30: PM

Expert Answer:

(a+b+c)2= a2+b2+c2+ 2ab+ 2bc+ 2ca

92= a2+b2+c2+ 2(ab+bc+ca)

81= a2+b2+c2+ 2(23)

81 = a2+b2+c2+ 46

a2+b2+c2= 35

Answered by  | 15th Sep, 2013, 11:01: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.