Решите уравнение x3+3x2-8x-24=0 (3-2x)(2/7x-4)=0
1)x3+3x2-8x-24=0
х2(х+3)-8(х+3)=0
(х+3)(х2-8)=0
х+3=0 х2-8=0
х=-3 х= +√8 х=-√8
2)(3-2x)(2/7x-4)=0
3-2х=0 2/7х-4=0
х=3/2 х=4*7/2=14