Question

Calculati: DAU 20 PUNCTE!!
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(a+b + b+a) :11=

Answer 1

   
[tex]\displaystyle \\ (\overline{ab}+\overline{ba}) : 11 = \frac{\overline{ab}+\overline{ba}}{11}= \frac{10a+b+10b+a}{11}= \\ \\ \frac{10a+a+10b+b}{11}= \frac{11a+11b}{11}= \frac{11(a+b)}{11}= \boxed{a+b} [/tex]