please solve question number 11 and 16
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question no. 11
a^2+b^2+c^2=29
ab+bc+ca=26
2(ab+bc+ac) =26×2
2ab+2bc+2ac=52
(a+b+c) ^2=a^2+b^2+c^2+2ab+2bc+2ac
=29+52
=81
a+b+c=9
question no. 16 I don't know sorry :( :(
a^2+b^2+c^2=29
ab+bc+ca=26
2(ab+bc+ac) =26×2
2ab+2bc+2ac=52
(a+b+c) ^2=a^2+b^2+c^2+2ab+2bc+2ac
=29+52
=81
a+b+c=9
question no. 16 I don't know sorry :( :(
sunny170:
its ok
thank you for the 11 question
my pleasure
thanks for selecting my answer as brainliest
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