Question 153680
{{{4x^2 - 1 = 0}}}
{{{x^2-1/4=0}}}
{{{(x+1/2)(x-1/2)=0}}}
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{{{x+1/2=0}}}
{{{highlight(x=-1/2)}}}
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{{{x-1/2=0}}}
{{{highlight(x=1/2)}}}