Answer
$x^{4}+5x^{3}-3x^{2}-11x+20$
Work Step by Step
$(x+5)(x^{3}-3x+4)=x(x^{3}-3x+4)+5(x^{3}-3x+4)=(x)(x^{3})+(x)(-3x)+(x)(4)+(5)(x^{3})+(5)(-3x)+(5)(4)=x^{4}-3x^{2}+4x+5x^{3}-15x+20=x^{4}-3x^{2}+4x+5x^{3}-15x+20=x^{4}+5x^{3}-3x^{2}-11x+20$
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