Question

35)Calculati:
a) 3·$( 3\frac{1}{2} -1,25$·2)-($\sqrt{5} - \frac{2,5}{ \sqrt{5} }$)·$\sqrt{5}$=

P.S=Raspunsul final este 0,5

Answer 1

3*(7/2-2,5)-(5-2,5/√5)*√5=
3*(7/2-25/10)-(2,5/√5)*√5=
3*5/10-2,5=
15/10-25/10=-5/10=-0,5