(x²+x-6)(x²+x-8)-24=(x²+x-6)[(x²+x-6)-2]-24=(x²+x-6)²-2(x²+x-6)-24=[(x²+x-6)-6][(x²+x-6)+4]=(x²+x-12)(x²+x-2)=(x-3)(x+4)(x-1)(x+2)(x+1)(x-2)(x-3)...