Question

${x}^{2} - 49 = 0$
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Answer 1

x2-49=0
x2= 49
x= raíz de 49
x=7

Answer 2

Oie, Td Bom?!

$x {}^{2} - 49 = 0$

$x {}^{2} = 49$

$x = ± \sqrt{49}$

$x = ±7$

$S = \left \{7 , - 7\right \}$

Att. Makaveli1996