Question

2xao quadrado menos 98 igual a 0 resposta

Answer 1

$2 {x}^{2} - 98 = 0 \\ 2 {x}^{2} = 0 + 98 \\ 2 {x}^{2} = 98 \\ x = + - \sqrt{ \frac{98}{2} }$
$x = + - \sqrt{ 49}$
$x" = 7$
x' = -7