X^2+3X=0

解

X^{2} + 3 X = 0

X = 0, X = - 3

解答ステップ

X^{2} + 3 X = 0

解くとthe二次式

X_{1, 2} = \frac{- 3 \pm 3 ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

3^{2} - 4 \cdot 1 \cdot 0 = 3

X_{1, 2} = \frac{- 3 \pm 3}{2 \cdot 1}

解を分離する

X_{1} = \frac{- 3 + 3}{2 \cdot 1}, X_{2} = \frac{- 3 - 3}{2 \cdot 1}

X = \frac{- 3 + 3}{2 \cdot 1} : 0

X = \frac{- 3 - 3}{2 \cdot 1} : - 3

二次equationの解:

X = 0, X = - 3