( 1 ⁴₅ + ¹⁹₂₀) *2 - 6 ¹₂ 3√3 - 2√3 - 4√3

( 1 ⁴₅ + ¹⁹₂₀) *2 - 6 ¹₂=2(1 16/20+19/20)-6,5=2(55/20)-6,5= 55/10-65/10=-10/10=-1 3√3 - 2√3 - 4√3 =-3√3

zad 1 (1i1/2 +19/20)*2-6i1/2=( 1i10/20+19/20)*2-6i1/2= 2i9/20*2-6i1/2 =4i18/40 -6i1/2=4i18/40-6i 20/40= -2i2/40