(x²+x)(x²+x-2)=24(x²+x)²-2(x²+x)-24=0(x²+x-6)(x²+x+4)=0(x+3)(x-2)(x²+x+4)=0∴x+3=0 x-2=0 x²+x+4=0∴x1=-3x2=2