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人気のある代数 >

2x^2-4x+c=0

解

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

解

x = \frac{4 + 16 - 8 c}{4}, x = \frac{4 - 16 - 8 c}{4}

解答ステップ

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

解くとthe二次式

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

簡素化

(- 4)^{2} - 4 \cdot 2 c : 16 - 8 c

x_{1, 2} = \frac{- ( - 4 ) \pm 16 - 8 c}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 4 ) + 16 - 8 c}{2 \cdot 2}, x_{2} = \frac{- ( - 4 ) - 16 - 8 c}{2 \cdot 2}

x = \frac{- ( - 4 ) + 16 - 8 c}{2 \cdot 2} : \frac{4 + 16 - 8 c}{4}

x = \frac{- ( - 4 ) - 16 - 8 c}{2 \cdot 2} : \frac{4 - 16 - 8 c}{4}

二次equationの解:

x = \frac{4 + 16 - 8 c}{4}, x = \frac{4 - 16 - 8 c}{4}

グラフ

人気の例

4 x^{2} + 8 x = - 1

h^{2} + 10 h + 9 = 0

solvefor x,f(x+2)=6(x+2)^2-7

so l v e f or x, f (x + 2) = 6 (x + 2)^{2} - 7

solvefor x,x^2=2y+4z

so l v e f or x, x^{2} = 2 y + 4 z

completesquare x^2-18x+74=0

co m pl e t es q u a re x^{2} - 18 x + 74 = 0