Question

$2x {}^{2} - 98 = 0$
me ajudem pfv​

Answer 1

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$2x^2-98=0$

$2x^2=98$

$x^2=\frac{98}{2}$

$x^2=49$

$x=±\sqrt{49}$

$x=+7$

$x=-7$

$sol:\:\:-7 ;+7$

Answer 2

Resposta:

$V=\{-7,+7\}$

Explicação:

$2x^{2} -98=0\\2x^{2} =0+98\\2x^{2} =98\\x^{2} =\frac{98}{2}\\x^{2} =49\\x=\pm\sqrt{49}\\x=\pm\:7\\\\Logo\:V=\{-7,+7\}$