Question 671710
{{{x^4 - 16 = 0}}}
...
{{{x^4 = 16}}}
{{{root(4,x^4) = root(4,16)}}}
{{{root(4,x*x*x*x) = root(4,2*2*2*2)}}}
...
{{{highlight_green(x = 2)}}}
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