Question 363152
For zeros? 
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{{{graph(300,300,-5,5,-5,5,x^3+3x^2+25x+75)}}}
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{{{f(x)=x^3+3x^2+25x+75=(x+3)(x^2+25)}}}
Real:
{{{x+3=0}}}
{{{highlight(x=-3)}}}
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Complex:
{{{x^2+25=0}}}
{{{x^2=-25}}}
{{{highlight(x=0 +- 5i)}}}