Question

(x-2)(x² +6x+9)=6(x+3)
Подробное решение

Answer 1

х³+6х²+9х-2х²-12х-18=6х+18
х³+4х²-3х-18-6х-18=0
х³+4х²-9х-36=0
(х³+4х²)-(9х+36)=0
х²(х+4)-9(х+4)=0
(х+4)(х²-9)=0
(х+4)(х-3)(х+3)=0
х+4=0 х-3=0 х+3=0
х=-4    х=3    х=-3