Factor completely using integer coefficients:
g)x^4-16x^2+36
h)4x^3-8x^2-25x+50
i)36x^2-x^4-100
K)x^5-2x^4-x^3+2x^2-12x+24
L)5x^6+15x^5-50x^4-80x^2-240x+800