Please solve this quadratic equation:
9^x-1 = 27^X-1​

The correct answer is:  [B]:  " 24 cm² " .

Formula for the "Surface Area", "A" , of a cube:

 A = 6 a² ; 

in which  "a"  =  edge length  =  " 2 cm " .
    A  = 6 * (2 cm)²

    A =  6 * 2² * cm² ;

    A  =  6 * 4 * cm² ;

→  A  = 24 cm² ;  which is:  Answer choice:  [B]:  " 24 cm² " .