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人気のある代数 >

3x^2-20x+20=0

解

3 x^{2} - 20 x + 20 = 0

解

x = \frac{2 ( 5 + 10 )}{3}, x = \frac{2 ( 5 - 10 )}{3}

+1

十進法表記

x = 5.44151 \dots, x = 1.22514 \dots

解答ステップ

3 x^{2} - 20 x + 20 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 20 ) \pm ( - 20 ) ^{2} - 4 \cdot 3 \cdot 20}{2 \cdot 3}

(- 20)^{2} - 4 \cdot 3 \cdot 20 = 410

x_{1, 2} = \frac{- ( - 20 ) \pm 4 10}{2 \cdot 3}

解を分離する

x_{1} = \frac{- ( - 20 ) + 4 10}{2 \cdot 3}, x_{2} = \frac{- ( - 20 ) - 4 10}{2 \cdot 3}

x = \frac{- ( - 20 ) + 4 10}{2 \cdot 3} : \frac{2 ( 5 + 10 )}{3}

x = \frac{- ( - 20 ) - 4 10}{2 \cdot 3} : \frac{2 ( 5 - 10 )}{3}

二次equationの解:

x = \frac{2 ( 5 + 10 )}{3}, x = \frac{2 ( 5 - 10 )}{3}

グラフ

人気の例

a^{2} + 2^{2} = 5^{2}

x (x + 1) = 240

solvefor a,5a^2+5b^2=2a-6b-2

so l v e f or a, 5 a^{2} + 5 b^{2} = 2 a - 6 b - 2

4 x^{2} - 6 x + 4 = 0

- \frac{1}{2} x^{2} - 24 = 0