Question 342472
{{{4x^2=20}}}
{{{4x^2-20=0}}}
{{{4(x-sqrt(5))(x+sqrt(5))=0}}}
Two solutions:
{{{x-sqrt(5)=0}}}
{{{highlight(x=sqrt(5))}}}
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{{{x+sqrt(5)=0}}}
{{{highlight(x=-sqrt(5))}}}