6x-0,5xy do potegi 2 x = 0,05 , y = -3 4a-3/5 : 5 a = -1 , b = -2

6*0,05 - (5*0,05*5*-3²) = 0,3 - (0,25*30) = 0,3 - 7,5 = -7,2 4a-3/5 : 5 = 4*-1 - 3/5 : 5 = -4 - 3/25 = -4i3/25

6x-0.5xy^2=6*5/100-0.5*0.05*(-3)^2=30/100-1/2*5/100*9=30/100-5/200*9=30/100-45/200=60/200-45/200=15/200=3/40=0.075 4a-3/5:5=4*(-1)-3/5:5=-4-3/5*1/5=-4-3/25=-4i3/25