Question 835384
{{{ graph( 300, 200, -4, 4, -4, 4, x^4+x^3+2x^2+4x-8) }}}
{{{P(x)=x^4+x^3+2x^2+4x-8}}}
{{{P(x)=(x-1)(x+2)(x^2+4)}}}
{{{P(x)=(x-1)(x+2)(x+2i)(x-2i)}}}