Question

b) (x+2)³= 11.121

Answer 1

(x+2)³=11.11.11

(x+2)³=11³

=>x+2=11

x=9

 

Answer 2

b/

(x+2)^3=11.121

=>(x+2)^3=1331

Vì 11^3=1331 nên

=>x+2=11

=>x=11-2=9

Vậy x=9

Answer 3

( x + 2 )³ =11 . 121

( x + 2 )³ = 1331

( x + 2 )³  = 11³

 => x + 2 = 11

           x = 11 - 2

           x = 9

Vậy x = 9