Quadratic Equations With Complex Roots (Leaving Cert Mathematics): Flashcards

$b^2 - 4ac < 0$

$b^2 - 4ac$

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$a + bi$

$\sqrt{-1}$

$-1$

$a$

$b$

$a - bi$ (conjugate pair)

$z$

$2i$

$2 - 3i$