Question

(1+2i) (-2+i) express in form of a+bi... a,b€R i=√-1 state value of a and b​

Answer 1

Step-by-step explanation:

a+ib=(-2+i+4i-2)

a+ib=-4+5i

so, a=-4

b=5

Answer 2

Answer:

Hey mate plzz refer to the attachment