Which will result in a perfect square trinomial?

(3x – 5)(3x – 5)
(3x – 5)(5 – 3x)
(3x – 5)(3x + 5)
(3x – 5)(–3x – 5)

Perfect square trinomial is in form
(ax+b)² or (ax+b)(ax+b)
the 2 phrases are identical


answer is obviously the first option