Răspuns :
2* [15^2 -3^2 *(x-5)] +2^4 *3^2 =324
2*[225- 9*(x-5)] + 16*9 =324
2*[225- 9*(x-5)] + 144 =324
2*[225- 9*(x-5)] =180
225- 9*(x-5) =90
-9*(x-5) = -135
x-5 = 15
x=20
2* [15^2 -3^2 *(x-5)] +2^4 *3^2 =324
2*[225- 9*(x-5)] + 16*9 =324
2*[225- 9*(x-5)] + 144 =324
2*[225- 9*(x-5)] =180
225- 9*(x-5) =90
-9*(x-5) = -135
x-5 = 15
x=20