Question

if a + b + c = 0 find the value of A^2+B^2+C^2/C^2-AB

Answer 1

Answer:

(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca=0

a^2+b^2+c^2=2(-a(b+c)-bc)

from given condition:

a+b+c=0

therfore:b+c=-a

use above condition to get

a^2+b^2+c^2=2(a^2-bc)

therfore,k=2

I Hope It Will Help!
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