Which will result in a perfect square trinomial? (3x - 5)(3x – 5)
(3x - 5)(5-3x)
(3x - 5)(3x+5)
(3x.-5)(-3x-5)

Consider u = {x|x is a negative real number}which is an empty set? o {x|x eu and x has a negative cube root}o {x|x eu and x has a negative square root}{x|x eu and x is equal to the product of a positive number and -1}{x|x eu and x is equal to the sum of one negative and one positive number?