It is: 4x(1+4)
4x(4x^2 + 3x + 1)
(x + 1)(5x - 1)
-((4x + 1)(x - 1))
2(x - 1)(2x + y)
4x(10x + 1)
It is: 4x(1+4)
(2x-1)(2x-1) = 4x^2 -4x + 1
4x(4x^2 + 3x + 1)
(4x - 3)(4x - 1)
4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2
(x + 1)(5x - 1)
x3 + x2 + 4x + 4 = (x2 + 4)(x + 1)
-((4x + 1)(x - 1))
4x2 - 4x + 2xy - 2y = 4x(x - 1) + 2y(x - 1) (4x + 2y)(x - 1).
(2x + 1)(4x + 7)
2(x - 1)(2x + y)