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Beliebt Geometry >

leitkurve-2x^2+4x-9

Lösung

leitkurve

- 2 x^{2} + 4 x - 9

Lösung

y = - \frac{55}{8}

Schritte zur Lösung

Rewrite

y = - 2 x^{2} + 4 x - 9

in the standard form

4 (- \frac{1}{8}) (y - (- 7)) = (x - 1)^{2}

(h, k) = (1, - 7), p = - \frac{1}{8}

Parabola is symmetric around the y-axis and so the directrix is a line parallel to the x-axis, a distance

- p

from the center

(1, - 7)

y-coordinate

y = - 7 - p

y = - 7 - (- \frac{1}{8})

Fasse zusammen

y = - \frac{55}{8}

Graph

Beliebte Beispiele

leitkurve y=-1/12 x^2

d i rec t r i x y = - \frac{1}{12} x^{2}

leitkurve (40x^3)/(3x)

d i rec t r i x \frac{40 x ^{3}}{3 x}

leitkurve (x-3)^2=-4(y+1)

d i rec t r i x (x - 3)^{2} = - 4 (y + 1)

leitkurve y=x^2-3x^2

d i rec t r i x y = x^{2} - 3 x^{2}

leitkurve-2x^2-4x+y+70=0

d i rec t r i x - 2 x^{2} - 4 x + y + 70 = 0