#complex number q

11 messages · Page 1 of 1 (latest)

azure cedar
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i dont understand it at all

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olive hollow
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well if you want to find to find the square root of 2+iroot5

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you could say this complex number squared is 2+iroot5

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so if you let the complex number be x +iy

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then (x+iy)^2= 2 + iroot5

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x^2 +2ixy -y^2= 2 + iroot5

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Then you can say x^2-y^2 = 2 because thats the real part of the equation

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and that means 2xy=root5 because its the imaginary part

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then you can just solve simultaneously

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to find the numbers