Math, asked by Marina2171, 1 year ago

If a^2 + b^2 +c^2=280 and ab+bc+ca=9/2, find the value of (a+b+c)^2.
Plz give the answer in detail.....Plz solve this........The best answer will be marked as brainliest.

Answers

Answered by sk0768173gmailcom
3
(a+b+c)^2 = a^2 +b^2 +c^2 +2(ab+bc+ca)
=280+2×9/2
=280+9=289 Ans

gautam011p9snux: l don't think it is correct
sk0768173gmailcom: really
sk0768173gmailcom: then tell me your solution dear
gautam011p9snux: l can't solve this question I am confused
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