What polynomial has roots of - 4,-1, and 6?

A polynomial with the roots r1, r2 and r3 has factors of

(x-r1), (x-r2) and (x-r3) in it, it can be written in form

c (x-r1) ᵃ (x-r2) ᵇ (x-r3) ⁿ

where c is a constant and a, b, and n are the powers

so roots of - 4,-1 and 6 are factors of

(x - (-4)) (x - (-1)) (x-6) = (x+4) (x+1) (x-6)

in expanded form

x³-x²-26x-24