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人気のある代数 >

9x^2-19x+2=0

解

9 x^{2} - 19 x + 2 = 0

解

x = 2, x = \frac{1}{9}

+1

十進法表記

x = 2, x = 0.11111 \dots

解答ステップ

9 x^{2} - 19 x + 2 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 19 ) \pm ( - 19 ) ^{2} - 4 \cdot 9 \cdot 2}{2 \cdot 9}

(- 19)^{2} - 4 \cdot 9 \cdot 2 = 17

x_{1, 2} = \frac{- ( - 19 ) \pm 17}{2 \cdot 9}

解を分離する

x_{1} = \frac{- ( - 19 ) + 17}{2 \cdot 9}, x_{2} = \frac{- ( - 19 ) - 17}{2 \cdot 9}

x = \frac{- ( - 19 ) + 17}{2 \cdot 9} : 2

x = \frac{- ( - 19 ) - 17}{2 \cdot 9} : \frac{1}{9}

二次equationの解:

x = 2, x = \frac{1}{9}

グラフ

人気の例

9 w^{2} - 30 w + 25 = 0

3 x^{2} + x - 24 = 0

100+60x-12x^2=0

100 + 60 x - 12 x^{2} = 0

(ax^2)/4+x/2 = 2/a

\frac{a x ^{2}}{4} + \frac{x}{2} = \frac{2}{a}

solvefor x,6x^2=7xy+20y^2

so l v e f or x, 6 x^{2} = 7 x y + 20 y^{2}