Bilangan kompleks : Z1 = 4 + 5i dan Z2 = 3 – 6i ; Tentukan nilai dari (Z_1- Z_2)/Z_2

[tex]\displaystyle \frac{Z_1-Z_2}{Z_2}=\frac{(4+5i)-(3-6i)}{3-6i}=\frac{(4-3)+(5-(-6))i}{3-6i} \\ \frac{1+11i}{3-6i}=\frac{1+11i}{3-6i}\times \frac{3+6i}{3+6i}=\frac{3+(6+33)i-66}{9+36} \\ \frac{-63+39i}{45} \\ \frac{-21+13i}{15} = \frac{1}{15}(-21+13i)[/tex]