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10 cards from this deck
If a×b=0a \times b = 0a×b=0, then a=0a = 0a=0 and/or b=0b = 0b=0
x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2a−b±b2−4ac
Δ=b2−4ac\Delta = b^2 - 4acΔ=b2−4ac
Non-real (complex), no real solutions
Real and equal, one repeated solution
Real and unequal, two distinct solutions
Roots are rational
Roots are irrational
x=3x = 3x=3 or x=−5x = -5x=−5
Otherwise equation wouldn't be quadratic
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