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人気のある代数 >

2x^2-10x+2=0

解

2 x^{2} - 10 x + 2 = 0

解

x = \frac{5 + 21}{2}, x = \frac{5 - 21}{2}

+1

十進法表記

x = 4.79128 \dots, x = 0.20871 \dots

解答ステップ

2 x^{2} - 10 x + 2 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 10 ) \pm ( - 10 ) ^{2} - 4 \cdot 2 \cdot 2}{2 \cdot 2}

(- 10)^{2} - 4 \cdot 2 \cdot 2 = 221

x_{1, 2} = \frac{- ( - 10 ) \pm 2 21}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 10 ) + 2 21}{2 \cdot 2}, x_{2} = \frac{- ( - 10 ) - 2 21}{2 \cdot 2}

x = \frac{- ( - 10 ) + 2 21}{2 \cdot 2} : \frac{5 + 21}{2}

x = \frac{- ( - 10 ) - 2 21}{2 \cdot 2} : \frac{5 - 21}{2}

二次equationの解:

x = \frac{5 + 21}{2}, x = \frac{5 - 21}{2}

グラフ

人気の例

solvefor x,x^2-3kx+9=0

so l v e f or x, x^{2} - 3 k x + 9 = 0

solvefor x,x^2+3xy+y^2=1

so l v e f or x, x^{2} + 3 x y + y^{2} = 1

5x^2+28x-2=7x-6

5 x^{2} + 28 x - 2 = 7 x - 6

2 x^{2} - 5 = 67

(q^2)/(10000)-q+3900=7000-1.1q

\frac{q ^{2}}{10000} - q + 3900 = 7000 - 1.1 q