Video solusi : Jika x y=a, x z=b, y z=c , dan tidak ada yang bernilai nol, maka x^(2)+y^(2)+ z^(2)=...
a. (a b+a c+b c)/(a b c)
b. (a^(2)+b^(2)+c^(2))/(a b c)
C. ((a+b+c)^(2))/(a b c)
d. ((a b+a c+b c)^(2))/(a b c)
e. ((a b)^(2)+(a c)^(2)+(b c)^(2))/(a b c)