0,5√121+3√0,81

To simplify the expression, we can calculate the square root of 121 and the square root of 0.81, and then perform the addition: 0,5√121 + 3√0.81

√121 = 11 (because 11 * 11 = 121) √0.81 = 0.9 (because 0.9 * 0.9 = 0.81)

0,5 * 11 + 3 * 0.9 = 5.5 + 2.7 = 8.2

Therefore, 0,5√121 + 3√0.81 simplifies to 8.2.