设两根为X1,X2,X1>X2X1+X2=-P (1)X1*X2=q (2)(2)-(1)p+q=X1*X2-X1-X2=28X1*X2-X1-X2+1=29(X1-1)(X2-1)=29因为X1,X2都是正整数所以X1-1=29X2-1=1X1=30X2=2