Question

Determine as raizes da funcao quadratica
Y=1-x^2

Answer 1

veja

$y=1- x^{2} \\ 1- x^{2} =0 \\ - x^{2} =-1 \\ x^{2} =1 \\ x=\pm \sqrt{1 } \\ x=\pm1$

S={-1,1}