A.p is greater than 0 and q is less than 0. B.p is less than 0 and q is greater than 0.

(ps: Is there a problem with the quasi-question option? According to Vieta's theorem, the sum of the two equations is -p/a, the product of the two equations is q/a, and a is the coefficient of x 2, so p is greater than 0 and q is greater than 0. )

It is known that AB is perpendicular to DB at point B and CD is perpendicular to DB at point D, AB=6, CD=4, BD= 14. Ask if there is a point p on DB, so that the triangle with C, D and P as vertices is similar to the triangle with P, B and A as vertices. If yes, find the length of DP = X. When triangles C, D and P are similar to triangles P, B and A,