(X^2 -px + 8 )*(X^2 + 3x - q) = X^4 + (3-p)X^3 + (8 -3p-q)X^2 + (24 - pq)x -8q
不含x的3次方项与x的2次方项,故
3- p =0
8-3p-q = 0
所以 p=3 q=-1
(X^2 -px + 8 )*(X^2 + 3x - q) = X^4 + (3-p)X^3 + (8 -3p-q)X^2 + (24 - pq)x -8q
不含x的3次方项与x的2次方项,故
3- p =0
8-3p-q = 0
所以 p=3 q=-1