Question 1038028
The last term is +15
The other factors are (x-3)(x-5)(x-1)^2
(x^2-8x+15)(x-1)^2
That expands to
x^4-10x^3+32x^2-38x+15
{{{graph(300,200,-10,10,-10,20,x^4-10x^3+32x^2-38x+15)}}}