Question

2 X square + 4 x minus 1 is equal to zero equation solve by completing square ​

Answer 1

Answer:

$2 {x}^{2} + 4x - 1 = 0$

$and \: and \: sub \: \sqrt{2}$

${ \sqrt{2}x }^{2} + 2 \times \sqrt{2} x \times \sqrt{2} + \sqrt{2} - 1 - \sqrt{2} = 0$

${({ \sqrt{2}x } + \sqrt{2})}^{2} - \sqrt{2} - 1 = 0$