9x^2+5=1

解

9 x^{2} + 5 = 1

x = \frac{2}{3} i, x = - \frac{2}{3} i

解答ステップ

9 x^{2} + 5 = 1

5

を右側に移動します

9 x^{2} = - 4

以下で両辺を割る

9

x^{2} = - \frac{4}{9}

x^{2} = f (a)

の場合, 解は

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

x = - \frac{4}{9}, x = - - \frac{4}{9}

- \frac{4}{9} = \frac{2}{3} i

- - \frac{4}{9} = - \frac{2}{3} i

x = \frac{2}{3} i, x = - \frac{2}{3} i