4x2+20x+25 (2x+5)^2
x3 + 4x2 + x + 4 = (x + 4)(x2 + 1)
The quadratic 4x2+24x+11 = (2x+1)(2x+11)
4x2-36x+81 (2x-9)(2x-9)
4x2 - 23xy + 15y2 = (4x - 3y)(x - 5y)
4(x + 1)(x + 1)
4(x + 2)(x + 1)
4(x + 2)(x + 2)
4(x^2 + 2x + 8)
(2x - 5)(2x - 5)
(2x + 3)(2x - 1)
(2x - 1)(2x + 5)