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10 cards from this deck
f(x)=ax2+bx+cf(x) = ax^2 + bx + cf(x)=ax2+bx+c where a≠0a \neq 0a=0
Concavity (direction parabola opens)
a>0a > 0a>0
The y-intercept
x=−b2ax = -\frac{b}{2a}x=−2ab
Δ=b2−4ac\Delta = b^2 - 4acΔ=b2−4ac
No x-intercepts
R\mathbb{R}R (all real numbers)
[k,∞)[k, \infty)[k,∞)
The value of ∣a∣|a|∣a∣
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