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人気のある代数 >

x^2-16x+20=0

解

x^{2} - 16 x + 20 = 0

解

x = 2 (4 + 11), x = 2 (4 - 11)

+1

十進法表記

x = 14.63324 \dots, x = 1.36675 \dots

解答ステップ

x^{2} - 16 x + 20 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 16 ) \pm ( - 16 ) ^{2} - 4 \cdot 1 \cdot 20}{2 \cdot 1}

(- 16)^{2} - 4 \cdot 1 \cdot 20 = 411

x_{1, 2} = \frac{- ( - 16 ) \pm 4 11}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 16 ) + 4 11}{2 \cdot 1}, x_{2} = \frac{- ( - 16 ) - 4 11}{2 \cdot 1}

x = \frac{- ( - 16 ) + 4 11}{2 \cdot 1} : 2 (4 + 11)

x = \frac{- ( - 16 ) - 4 11}{2 \cdot 1} : 2 (4 - 11)

二次equationの解:

x = 2 (4 + 11), x = 2 (4 - 11)

グラフ

人気の例

x^{2} + 7 x = 10

6 n^{2} - 19 n + 15 = 0

completesquare x^2-18x-2=0

co m pl e t es q u a re x^{2} - 18 x - 2 = 0

x^{2} + 306 = 16 x - 3

x^2+10x+31=15x+21

x^{2} + 10 x + 31 = 15 x + 21