Question

How do you write a polynomial equation of least degree given the roots -1, 1, 4, -4, 5?

Answer 1

`(x+1)(x-1)(x-4)(x+4)(x-5)=0`
`color(white)("xxx")`...or, if you multiply the terms: `x^5-5x^4-10x^3+50x^2+16x-80=0`