X^2+4X+3=0

解

X^{2} + 4 X + 3 = 0

X = - 1, X = - 3

解答ステップ

X^{2} + 4 X + 3 = 0

解くとthe二次式

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

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

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

解を分離する

X_{1} = \frac{- 4 + 2}{2 \cdot 1}, X_{2} = \frac{- 4 - 2}{2 \cdot 1}

X = \frac{- 4 + 2}{2 \cdot 1} : - 1

X = \frac{- 4 - 2}{2 \cdot 1} : - 3

二次equationの解:

X = - 1, X = - 3