Question 956067
{{{f(x)=3x^4-x^3-9x^2+159x-52}}}
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{{{graph(300,300,-6,2,-50,50,3x^4-x^3-9x^2+159x-52)}}}
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{{{f(x)=(x+4)(3x-1)(x^2-4x+13)}}}
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{{{x^2-4x+13=0}}}
{{{x^2-4x+4+13=4}}}
{{{(x-2)^2=-9}}}
{{{x-2=0 +- 3i}}}
{{{x=2 +- 3i}}}