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15 cards from this deck
ฮ=b2โ4ac\Delta = b^2 - 4acฮ=b2โ4ac
ฮ\Deltaฮ
ฮ>0\Delta > 0ฮ>0
ฮ=0\Delta = 0ฮ=0
ฮ<0\Delta < 0ฮ<0
Two distinct real roots
One real root (or two equal real roots)
No real roots (complex conjugate pairs)
Opens upwards
Opens downwards
x=โb2ax = -\frac{b}{2a}x=โ2abโ
ccc
Two x-intercepts
One x-intercept (vertex touches x-axis)
No x-intercepts
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