Express
the following in form of
where a, b ER
a, b ER, ;= F find
value a and b.
the
(2+i)÷
(3-i) (1+2i)
Answers
Answer: 1)
(1+2i)(-2+i)
= -2 + i - 4i + i²
= -2 - 3i - 1
= -3 - 3i
Here
a = -3 and b = -3
2)
(1+i)(1-1)-1i(4 + 3i)(2 +i)
= (1 + i)(0) - 1i(4 + 3i)(2 +i)
= 0 - 1i(4 + 3i)(2 + i)
= -1i(4 + 3i)(2 + i) = (3 - 4i)(2+ i)
= 6 + 3i - 8i - 4i²
= 6 - 5i + 4
= 10 - 5i
Here
a = 10 and b = -5
3)
(1i) (3+2i)(3-2i)
= (i)(3² - i²)
= i(9 + 1)
= 10i = 0 + 10i
Here
a = 0 and b = 10
4)
(3-1)(1+2i)
= 3 + 6i - 1 - 2i
= 2 + 4i
Here
a = 2 and b = 4
5)
21 V-3
= 21√3√-1
= (21√3)i ∵ √(-1) = i
= 0 + (21√3)i
Here
a = 0 and b = (21√3)
Do in the same way others
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Answer:
(1+2i)(−2+i)
−2+i−4i−2
−4−3i
a=−4,b=−3
Step-by-step explanation:
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