X^2-6X+8=0

解

X^{2} - 6 X + 8 = 0

X = 4, X = 2

解答ステップ

X^{2} - 6 X + 8 = 0

解くとthe二次式

X_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 \cdot 1 \cdot 8}{2 \cdot 1}

(- 6)^{2} - 4 \cdot 1 \cdot 8 = 2

X_{1, 2} = \frac{- ( - 6 ) \pm 2}{2 \cdot 1}

解を分離する

X_{1} = \frac{- ( - 6 ) + 2}{2 \cdot 1}, X_{2} = \frac{- ( - 6 ) - 2}{2 \cdot 1}

X = \frac{- ( - 6 ) + 2}{2 \cdot 1} : 4

X = \frac{- ( - 6 ) - 2}{2 \cdot 1} : 2

二次equationの解:

X = 4, X = 2