Question

4) Express the following in the form of a+ib,
a, beRi=V-1. State the values of a and b.
i) (1+2i)(-2+i) ii) (1+i)(1-1)​

Answer 1

Step-by-step explanation:

(1+2i)(-2+i)

= -2+i-4i+2i^2

= -4-3i

a=-4 , b=-3

(1+i)(1-1)

=1-1+i-i

=0

a=0 , b=0