(х+2)^3+3х^2-11=(х+3)^3​

Question

(х+2)^3+3х^2-11=(х+3)^3​

Answer 1

Ответ:

-2

Объяснение:

x³+6x²+12x+8+3x²-11=x³+9x²+27x+27

x³-x³+6x²+3x²-9x²+12x-27x+8-11-27=0

-15x-30=0

-15x=30

x= -2

Answer 2

(х+2)³+3х²-11=(х+3)³

х³+6х²+12х+8+3х²-11=х³+9х²+27х+27
12х-27х=30
-15х=30
х=-2