The condition that x^4+ax^3+bx^2+cx+d is a perfect square is A)c^2=adB)c^2=ad^2C)c^2=a^2d^2D)c^2=a^2d

The answer is D) c^2=a^2d . As I calculate the answer simply by taking the same quadratic equations and after squaring it u will get the value of a,b,c,d and from that u can predict the answer