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10 cards from this deck
A number in the form z = a + bi, with a, b real.
They help solve equations without real solutions.
z = a + bi, with a and b real numbers.
Assume √z = x + iy; solve (x + iy)^2 = a + bi.
Symmetrically about the real axis.
They are separated into equations to solve for x and y.
z = a + bi with a,b real and i^2 = -1
x^2 - y^2 = a and 2xy = b
Substitute x,y into (x+iy)^2 and check it equals z
Assume x+iy; solve x^2 - y^2 = a and 2xy = b
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