3+2i
____
1-4i
i thought the answer was 11+(14i/16) but i was wrong :( any help is greatly appreciated.
____
1-4i
i thought the answer was 11+(14i/16) but i was wrong :( any help is greatly appreciated.
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(3+2i) / (1-4i)
rationalize by multiplying top and bottom by the denominator's conjugate: (1+4i):
(3+2i)(1+4i) / (1-4i)(1+4i)
[3(1) + 3(4i) +2i(1) +2i(4i)] / [1(1) + 1(4i) -4i(1) -4i(4i)]
[3 +12i +2i +8i^2] / [1 +4i -4i -16i^2]
[3 +14i +8i^2] / [1 -16i^2]
NOTE that i^2 = -1
[3 +14i +8(-1)] / [1 -16(-1)]
(3 +14i -8) / (1 +16)
(-5 +14i) / 17
aka
-5/17 + 14i/17
rationalize by multiplying top and bottom by the denominator's conjugate: (1+4i):
(3+2i)(1+4i) / (1-4i)(1+4i)
[3(1) + 3(4i) +2i(1) +2i(4i)] / [1(1) + 1(4i) -4i(1) -4i(4i)]
[3 +12i +2i +8i^2] / [1 +4i -4i -16i^2]
[3 +14i +8i^2] / [1 -16i^2]
NOTE that i^2 = -1
[3 +14i +8(-1)] / [1 -16(-1)]
(3 +14i -8) / (1 +16)
(-5 +14i) / 17
aka
-5/17 + 14i/17
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-5/17 + (14/17)i
Quite close actually.
Try multiplying the numerator and denominator by 1 + 4i.
Quite close actually.
Try multiplying the numerator and denominator by 1 + 4i.