Asked by precal
X^4 + 16 equals 0
Answers
Answered by
Steve
x^2 = 4i or -4i
x = ±√4i or ±√-4i
= ±2√i or ±2√-i
so, what's √i?
i = 1 cis 90°
√i = 1 cis 45° = 1/√2 + 1/√2 i
similarly for -i
x = ±√4i or ±√-4i
= ±2√i or ±2√-i
so, what's √i?
i = 1 cis 90°
√i = 1 cis 45° = 1/√2 + 1/√2 i
similarly for -i
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