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a2+b2+c2=250,ab+bc+ac=3,a+b+c=?

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a2+b2+c2=250,ab+bc+ac=3,a+b+c=?

Posted by Lal Prabhakar Singh 6 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Yogita Ingle 6 years, 6 months ago

(a + b + c)² = a² + b² + c² +2(ab + bc + ca)
=250 + 2 × 3
= 256
a + b + c = √256
= 16

Dishita Tuteja 6 years, 6 months ago

Appy identity for (a+b+c)2 then put values and answer comes out to be 16

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