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15 cards from this deck
Δ=b2−4ac\Delta = b^2 - 4acΔ=b2−4ac
Δ\DeltaΔ
Δ>0\Delta > 0Δ>0
Δ=0\Delta = 0Δ=0
Δ<0\Delta < 0Δ<0
Two distinct real roots
One real root (or two equal real roots)
No real roots (complex conjugate pairs)
Opens upwards
Opens downwards
x=−b2ax = -\frac{b}{2a}x=−2ab
ccc
Two x-intercepts
One x-intercept (vertex touches x-axis)
No x-intercepts
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