Answer :
(3x-5)(3x-5) gives a perfect square trinomial
because it is in the (a-b)square format
(a-b)square= asquare -2ab +bsquare
asquare -2ab + bsquare is a trinomial
because it is in the (a-b)square format
(a-b)square= asquare -2ab +bsquare
asquare -2ab + bsquare is a trinomial