Question

if a^2+b^2+c^2=35 , ab+bc+ca=23 value of a+b+c​

Answer 1

Answer:

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Answer 2

Answer:

We know,

(a+b+c)² =a²+b²+c²+2ab+2bc+2ca

Given,

a²+b²+c²=35 and

ab+bc+ca=23

Therefore,

=>(a+b+c)

2

=35+2(23)

=>(a+b+c)

2

=35+46

=>(a+b+c)

2

=81

=>(a+b+c)=

81

=>(a+b+c)=±9