4a^2+7=-79

解

4 a^{2} + 7 = - 79

a = \frac{43}{2} i, a = - \frac{43}{2} i

解答ステップ

4 a^{2} + 7 = - 79

7

を右側に移動します

4 a^{2} = - 86

以下で両辺を割る

4

a^{2} = - \frac{43}{2}

x^{2} = f (a)

の場合, 解は

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

a = - \frac{43}{2}, a = - - \frac{43}{2}

- \frac{43}{2} = \frac{43}{2} i

- - \frac{43}{2} = - \frac{43}{2} i

a = \frac{43}{2} i, a = - \frac{43}{2} i