(1+2i)(-2+i) express in the form of a+ib state value of a and b
Answers
Answered by
18
Answer:
-4-3i
Step-by-step explanation:
(1+2i)(-2+i)
=-2+i-4i+2isquare
=-4-3i. [as isquare=-1]
so the value of a=-4 and b=-3
Answered by
5
Answer:
a=-4 ,b=-3
Step-by-step explanation:
(1+2i) (-2+i)
1(-2+i) +2i(-2+i)
-2+i-4i+2i^2
-2-3i-2
-4-3i
hence, a =-4
b=-3
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