Use the axis-of-symmetry formula xv=−b2ax_{v}=-\frac{b}{2a} to find the vertex of y=−x2+4x+1y=$$-x^2+4x+1.$$

Graphing Quadratic Equations

12. Quadratic Equations and Functions / Graphing Quadratic Equations / 문제 4

문제 4

Use the axis-of-symmetry formula $x_{v} = - \frac{b}{2 a}$ to find the vertex of $y = - x^{2} + 4 x + 1$ .

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$(- 2, - 5)$

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