$x = - 0.5 $ OR $x=1$
Work Step by Step
$2x^2 - x - 1 = 0$ $2x^2 - 2x + x - 1 = 0$ $2x ( x-1) + 1 (x-1) = 0$ $(2x+1)(x-1) = 0$ $2x+1 =0 $ OR $x - 1 = 0$ $2x = -1$ OR $x=1$ $x = - 0.5 $ OR $x=1$
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