Respuesta :

Solution:

  • Given, side (a) = x+3
  • We know, surface area of a cube = 6a^2
  • Therefore, the surface area of the cube

[tex]6(x + 3) ^{2} \\ = 6( {x}^{2} + 6x + 9) \\ = 6 {x}^{2} + 36x + 54[/tex]

Answer:

The answer is

[tex] {6x}^{2} + 36x + 54[/tex]

Hope it helps.

Sorry for delay

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