4*(x-4)(x-6)(-x+12)≥0

4*(x-4)(x-6)(-x+12)≥0 4*(x²-6x-4x+24)(-x+12)≥o 4*(x²-10x+24)(-x+12)≥0 4*(-x³+12x²-11x+2x+23x+36x)≥0 4*(-x³+12x²+50)≥0 -4x³+48x²+200≥0