Question

x ao quadrado - 1 = 0​

Answer 1

Oie, Td Bom?!

$x {}^{2} - 1 = 0$

$x {}^{2} = 1$

$x = ± \sqrt{1}$

$x = ±1$

$S = \left \{- 1 \: ,\: 1 \right \}$

Att. Makaveli1996