Explicación paso a paso:
[tex] {x}^{2} + 4 = 20 \\ {x }^{2} = 20 - 4 \\ {x}^{2} = 16 \\ x = \sqrt{16} \\ x = 4[/tex]
VERIFICANDO:
[tex] {4}^{2} + 4 = 20 \\ 16 + 4 = 20 \\ 20 = 20[/tex]
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Verified answer
Explicación paso a paso:
[tex] {x}^{2} + 4 = 20 \\ {x }^{2} = 20 - 4 \\ {x}^{2} = 16 \\ x = \sqrt{16} \\ x = 4[/tex]
VERIFICANDO:
[tex] {4}^{2} + 4 = 20 \\ 16 + 4 = 20 \\ 20 = 20[/tex]