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How do you know if a quadratic has a minimum or maximum value?
Wiki User
∙ 11y ago
When the quadratic is written in the form:
y = ax2 + bx + c then
if a > 0 y has a minimum
if a < 0 y has a maximum
and if a = 0 y is not a quadratic but y = bx + c, and it is linear.
The maximum or minimum is at x = -b/(2a)
Wiki User
∙ 11y ago
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