Work Step by Step
$-2x^2+4x+6=0~~$ (Divide both sides of the equation by $-2$): $x^2-2x-3=0~~$ (Use: $-2x=x-3x$) $x^2+x-3x-3=0$ $x(x+1)-3(x+1)=0$ $(x-3)(x+1)=0$ $x-3=0$ $x=3$ $x+1=0$ $x=-1$
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