Question

$x2 - 4 = 0$
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Answer 1

x² - 4 = 0

x² = 4

x = √4

x = ± 2 ✓

Answer 2

Resposta:

$x {}^{2} - 4 = 0$

$x {}^{2} = 4$

$x = +/- \sqrt{4}$

$x = +/- 2$

$x1 = 2 \\ x2 = - 2$

S {x1 = 2 , x2 = - 2}

Espero ter ajudado!!!