Given x ^ 2-x-1 = 0, find the value of the algebraic formula x ^ 3-x ^ 2-3x + 2008

Given x ^ 2-x-1 = 0, find the value of the algebraic formula x ^ 3-x ^ 2-3x + 2008

x^2-x-1=0…………………………… ①x^3-x^2-3x+2008…………………… ②①×x =x^3-x^2-x=0………………… ③ Substituting 3 into 2, we get the solution of - 2x + 2008: 1 - X1 = ((radical 5) + 1) / 2 x2 = (1 - (radical 5)) / 2 into - 2x + 2008, we get 2007 -