Question

A) (1,5-1 i 1/3)*2 i 2/5-0,1=
b) (6,25-2 i 1/2) : 2 i 1/7-1=

Answer 1

a) (1,5-1 i 1/3)*2 i 2/5-0,1=(1 1/2-1 1/3)*2 2/5-1/10=(1 3/6-1 2/6)*12/5-1/10

=1/6*12/5-1/10=2/5-1/10=4/10-1/10=3/10=0,3

b) (6,25-2 i 1/2) : 2 i 1/7-1=(6,25-2,5):2 1/7-1=375/100:15/7-1=

= 375/100*7/15-1=175/100-1=1,75-1=0,75

Answer 2

a) (1,5-1 i 1/3)*2 i 2/5-0,1=(1 i 5/10 - 1 i 3/10)*2 i 2/5 - 0,1= 1 i 15/30 - 10/30)*2 i 2/5 - 0,1= 35/30 * 12/5 - 0,1= 84/30 - 0,1= 2 i 24/30 - 1/10= 2 i 24/30 - 3/30= 2 i 21/30

 

b) (6,25-2 i 1/2) : 2 i 1/7-1= (6,25 - 2,5) :2 i 1/7 - 1= 3,75  * 7/15 - 1= 3 i 75/100 * 7/15 - 1=  375/100 * 7/15 - 1= 175/100 - 1= 1,75-1=0,75