Question

Responda prfavor ! x2=1

Answer 1

Vamos lá ! 

x² = 1 

x = √1 

x' = 1 
 
ou 

x'' = -1            ok

Answer 2

$x^{2} =1 \\ \\ x=\pm \sqrt{1} \\ \\ x=\pm1 \\ \\ S=\{ -1,+1\}$