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10 cards from this deck
A complex number is in the form a + bi.
They indicate the presence of complex roots.
Use the quadratic formula for solutions.
It indicates two real roots.
It indicates one real root.
It indicates two complex conjugate roots.
x = (-b ± √(b² - 4ac)) / 2a.
x² + 1 = 0 has no real solutions.
They model oscillation and damping systems.
The roots are 1 ± 2i, complex conjugates.
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