I think that wants to be 16x2 - 40xy + 25y2
That factors to (4x - 5y)(4x - 5y) or (4x - 5y)2
(10x + 1)(x + 10)
That's not a trinomial, but it factors to x(x + 19)
(3x - 4)(x - 1)
x2-7x-44 (x-11)(x+4)
(x + 3)(x - 2)
prime
(2x + 1)(x + 3) are the factors.
-((x + 2)(x - 9))
(10x + 1)(x + 10)
-8(x - 7y)(x + 2y)
Factors are (7y - 3)(7y - 2) so it's not a perfect square.
Assuming you mean n2 + 11n + 30, the factors are (n + 6)(n + 5).
The factors of x2 + 5x + 4 would be (x + 1) and (x + 4)
That factors to (x - 14)(x - 2)
(8x + 5y)(64x^2 - 40xy + 25y^2)
9
Yes; the factored form would be (9c+4)(9c+4) or just (9c+4)2 Since the two factors are the same, the beginning trinomial 81c2+72c+16 is a perfect square trinomial