(1+2i)(-2+i) express in the formof a+ib
Answers
Answered by
0
Answer:
1+i2
Step-by-step explanation:
one is a and two is b
Answered by
1
Answer:
(-4+3i)
Step-by-step explanation:
Given
- (1+2i)(-2+i)
Simplifying further, we will get,
= 1(-2) + 1(i) +(2i)(-2) + 2i(i)
= -2 + i - 4i + 2i^2
= 3i - 2 + 2i^2
But, we know that,
- i^2 = -1
Substitute the value, we get,
= 3i - 2 + 2(-1)
= 3i - 2 - 2
= 3i - 4
= -4 + 3i
Hence, required value is (-4+3i).
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