Question 304583
{{{ graph( 300,300, -5, 5, -10, 10, x^4-5x^3-6x^2+32x+32) }}} 
It looks like single roots at x=-1 and x=-2 with a double root at x=4.
Verify that these solutions truly solve the equation by plugging in each x value and verifying that the sum is zero.