(x-2)(x-0.5)(x+4)
$$\\(x-2)(x-0.5)(x+4)\\\\ (x^2-0.5x-2x+1)(x+4)\\ (x^2-2.5x+1)(x+4)\\ (x+4)(x^2-2.5x+1)\\ x(x^2-2.5x+1) + 4(x^2-2.5x+1)\\$$
You should be able to finish it :))