9x^2+25=30y

解答

9 x^{2} + 25 = 30 y

(h, k) = (0, \frac{5}{6}), p = \frac{5}{6}

求解步骤

9 x^{2} + 25 = 30 y

将

9 x^{2} + 25 = 30 y

改写为标准形式:

4 \cdot \frac{5}{6} (y - \frac{5}{6}) = (x - 0)^{2}

因此抛物线性质是:

(h, k) = (0, \frac{5}{6}), p = \frac{5}{6}

x - y^{2} = 17

x - y^{2} = 15

- x^{2} + 12 x + 28 y = 204

(y + 5)^{2} = - 12 (x - 2)

- f (x) = 3 (x)^{2} + 2 (x) - 3