We know that the two roots of the equation x ^ 2-px + 1 = 0 (P belongs to R) are X1 and X2, and | x1 | + | x2 | = 3

We know that the two roots of the equation x ^ 2-px + 1 = 0 (P belongs to R) are X1 and X2, and | x1 | + | x2 | = 3

x1*x2=1
X1 and X2 are the same number
When both X1 and X2 are greater than zero
x1+x2=3
When both X1 and X2 are less than zero
-x1+(-x2)=3
x1+x2=-3
x1+x2=p
P = 3 or P = - 3