4x^2=-15

解

4 x^{2} = - 15

x = \frac{15}{2} i, x = - \frac{15}{2} i

解答ステップ

4 x^{2} = - 15

以下で両辺を割る

4

x^{2} = - \frac{15}{4}

x^{2} = f (a)

の場合, 解は

x = f (a), - f (a)

x = - \frac{15}{4}, x = - - \frac{15}{4}

- \frac{15}{4} = \frac{15}{2} i

- - \frac{15}{4} = - \frac{15}{2} i

x = \frac{15}{2} i, x = - \frac{15}{2} i