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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
x=−b2ax = -\frac{b}{2a}x=−2ab
Upward (vertex is minimum)
Downward (vertex is maximum)
(0,c)(0, c)(0,c)
f(x)=a(x−h)2+kf(x) = a(x - h)^2 + kf(x)=a(x−h)2+k with vertex at (h,k)(h, k)(h,k)
f(x)=a(x−x1)(x−x2)f(x) = a(x - x_1)(x - x_2)f(x)=a(x−x1)(x−x2) with roots x1x_1x1, x2x_2x2
When income equals cost; profit is zero
(−∞,k](-\infty, k](−∞,k]
[k,∞)[k, \infty)[k,∞)
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