Question

найдите корень уравнения (x+3)^3=-8

Answer 1

(х+3)³=-8

(х+3)³+8=0

х+3=-2

х=-2-3

х=-5

Answer 2

(x+3)³=-8

(x+3)³=(-2)³

x+3=-2

х=-2-3

х=-5             

(x+3)³=-8   (это проверка)

(-5+3)³=-8

   (-2)³=-8

       -8=-8