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人気のある代数 >

2x^2+12x-4=0

解

2 x^{2} + 12 x - 4 = 0

解

x = - 3 + 11, x = - 3 - 11

+1

十進法表記

x = 0.31662 \dots, x = - 6.31662 \dots

解答ステップ

2 x^{2} + 12 x - 4 = 0

解くとthe二次式

x_{1, 2} = \frac{- 12 \pm 1 2 ^{2} - 4 \cdot 2 ( - 4 )}{2 \cdot 2}

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

x_{1, 2} = \frac{- 12 \pm 4 11}{2 \cdot 2}

解を分離する

x_{1} = \frac{- 12 + 4 11}{2 \cdot 2}, x_{2} = \frac{- 12 - 4 11}{2 \cdot 2}

x = \frac{- 12 + 4 11}{2 \cdot 2} : - 3 + 11

x = \frac{- 12 - 4 11}{2 \cdot 2} : - 3 - 11

二次equationの解:

x = - 3 + 11, x = - 3 - 11

グラフ

人気の例

x^2=(x-9)^2+(x-8)^2

x^{2} = (x - 9)^{2} + (x - 8)^{2}

x^{2} = 3^{2} + 5^{2}

7 x^{2} - 25 x = 0

solvefor t,d=Vt+1/2 at^2

so l v e f or t, d = V t + \frac{1}{2} a t^{2}

completesquare x^2+4x+4

co m pl e t es q u a re x^{2} + 4 x + 4