Question

resolva,as equacões 2x²-98=0

Answer 1

$2x^2 - 98 = 0 \\ 2x^2 = 98 \\ x^2 = \frac{98}{2} \\ x^2 = 49 \\ x = \sqrt{49} \\ \\ x = \pm7$

Answer 2

Resposta:

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

Explicação:

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