Answer:
(a) 3i-5
(b) 3+7i
(c) -6+i
(d) 0
Step-by-step explanation:
We have given two complex numbers z = -4 + 5 i and w = -1 - 2 i
We have to perform following operation
(a) [tex]z+w=-4+5i-1-2i=3i-5[/tex]
(b) [tex]z-w=-4+5i-(-1-2i)=-4+5i+1+2i=-3+7i[/tex]
(c) [tex]z+w=-4+5i+2\times (-1-2i)=-4+5i-2-4i=-6+i[/tex]
(d) [tex]z-z=-4+5i-(-4+5i)=0[/tex]
(e) There is no other method for doing addition and subtraction of complex number it is similar as like real number
