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人気のある代数 >

x^2-18x+73=0

解

x^{2} - 18 x + 73 = 0

解

x = 9 + 22, x = 9 - 22

+1

十進法表記

x = 11.82842 \dots, x = 6.17157 \dots

解答ステップ

x^{2} - 18 x + 73 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 18 ) \pm ( - 18 ) ^{2} - 4 \cdot 1 \cdot 73}{2 \cdot 1}

(- 18)^{2} - 4 \cdot 1 \cdot 73 = 42

x_{1, 2} = \frac{- ( - 18 ) \pm 4 2}{2 \cdot 1}

解を分離する

x_{1} = \frac{- ( - 18 ) + 4 2}{2 \cdot 1}, x_{2} = \frac{- ( - 18 ) - 4 2}{2 \cdot 1}

x = \frac{- ( - 18 ) + 4 2}{2 \cdot 1} : 9 + 22

x = \frac{- ( - 18 ) - 4 2}{2 \cdot 1} : 9 - 22

二次equationの解:

x = 9 + 22, x = 9 - 22

グラフ

人気の例

completesquare x^2-10x+15=0

co m pl e t es q u a re x^{2} - 10 x + 15 = 0

completesquare 2x^2-12x+6=0

co m pl e t es q u a re 2 x^{2} - 12 x + 6 = 0

-5(-x+3)-2= 1/2 x(x+2)-19/2

- 5 (- x + 3) - 2 = \frac{1}{2} x (x + 2) - \frac{19}{2}

solvefor x,2x^2+4x-3=0

so l v e f or x, 2 x^{2} + 4 x - 3 = 0

solvefor x,rango^4y^2=x^2-4x

so l v e f or x, r an g o^{4} y^{2} = x^{2} - 4 x