How do you solve using the completing the square method $2x^2 - 4x -1=0$ ?

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Answer 1 · 2017-05-20T02:12:11

$x=1+sqrt(1.5)$
$x=1-sqrt(1.5)$

Given-

$2x^2-4x-1=0$
$2x^2-4x=1$

$(2x^2)/2-(4x)/2=1/2$
$x^2-2x=0.5$

$x^2-2x+1=0.5+1=1.5$
$(x-1)^2=1.5$
$x-1=+-sqrt(1.5)$
$x=1+-sqrt(1.5)$

How do you solve using the completing the square method 2x^2 - 4x -1=02x^2 - 4x -1=0?