Question

If x+y+z=0 what will be the value of
$x {}^{2} + y {}^{2} + z {}^{2} \div x {}^{2} - yz$

Answer 1

x^2+y^2+z^2÷x^2-yz
(x+y+z)^2÷x^2-yz
(0)^2÷x^2-yz
0÷x^2-yz
0