Answer the following questions related to perfect square trinomials of the form x2+bx+c.
(i) Define a perfect square trinomial having leading coefficient 1.
(ii) Verify that the polynomial x2+10x+25 is a perfect square trinomial.
(iii) Factorise x2+10x+25 and hence write the general condition connecting b and c for which the trinomial x2+bx+c becomes a perfect square.