Question

Fie a€R. Calculati: a) |2 √3-3 √2; b) |(-3)la puterea -3|-|-1/27; c) |-(-10)/11|x|-(+1,1)|; d) |a|x|-a|-a la putere a doua.

Answer 1

I 2√3-3√2I=3√2-2√3       
 │(-3)⁻ᶾ│ -│-1/27│=│(-1/3)ᶾ│-│-1/27│=│-1/27│-│-1/27│=1/27-1/27=0
│-(-10)/11│∙│-(1,1)│=10/11∙11/10=1
│a│∙│-a│-a²=a²-a²=0