Question

7x^2-14=0 valor do x​

Answer 1

Resposta:

$s = ( - \sqrt{2} \: e \: \sqrt{2} )$

exp

$7 {x}^{2} - 14 = 0 \\ {x}^{2} = \frac{14}{7} \\ {x}^{2} = 2 \\ x = + - \sqrt{2}$