x^2-4x=-4

解

x^{2} - 4 x = - 4

x = 2

解答ステップ

x^{2} - 4 x = - 4

4

を左側に移動します

x^{2} - 4 x + 4 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 4 ) \pm ( - 4 ) ^{2} - 4 \cdot 1 \cdot 4}{2 \cdot 1}

(- 4)^{2} - 4 \cdot 1 \cdot 4 = 0

x_{1, 2} = \frac{- ( - 4 ) \pm 0}{2 \cdot 1}

x = \frac{- ( - 4 )}{2 \cdot 1}

\frac{- ( - 4 )}{2 \cdot 1} = 2

x = 2

二次equationの解:

x = 2