Question

Determine an equation (in standard form) for the family of cubic functions with zeroes: 2, 1+- radical 5

Answer 1

(x-2)(x-(1+√5))(x-(1-√5))

= (x-2)((x-1)-√5)((x-1)+√5)
= (x-2)((x-1)^2 - 5)
...