49x^2+4=0

解

49 x^{2} + 4 = 0

x = \frac{2}{7} i, x = - \frac{2}{7} i

解答ステップ

49 x^{2} + 4 = 0

4

を右側に移動します

49 x^{2} = - 4

以下で両辺を割る

49

x^{2} = - \frac{4}{49}

x^{2} = f (a)

の場合, 解は

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

x = - \frac{4}{49}, x = - - \frac{4}{49}

- \frac{4}{49} = \frac{2}{7} i

- - \frac{4}{49} = - \frac{2}{7} i

x = \frac{2}{7} i, x = - \frac{2}{7} i