Question

if a²+b²+c²=200 and ab+bc+ca=60 then value of a+b+c​

Answer 1

hey mate,

here is your answer.✌✌

(a+b+c)^2=a^2+b^2+c^2+2(ab+bc+ca)

=200+2(60)

=200+120

=320

(a+b+c)^2=320

a+b+c=√320

a+b+c=17

Hope this helps you.