The polynomial IS written in descending order.
(3x + 7)(2x - 9)
(2x + 5)(6x - 5)
5x2 + 29x - 6 = (5x - 1)(x + 6).
x(x + 2)(x - 5)
It's not enough to copy the question off the test. If you don't tell us what the trinomial is, we can't factor it for you.
It is: 4x2-7x-15 when factored is (4x+5)(x-3)
4x2-7x-15 = (4x+5)(x-3) when factored