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10 cards from this deck
i=−1i = \sqrt{-1}i=−1
i2=−1i^2 = -1i2=−1
−a=ia\sqrt{-a} = i\sqrt{a}−a=ia
a+bia + bia+bi where a,b∈Ra, b \in \mathbb{R}a,b∈R
aaa
bbb
a−bia - bia−bi
a2+b2a^2 + b^2a2+b2
Multiply numerator and denominator by conjugate
Equate real parts and imaginary parts separately
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