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人気のある代数 >

x^2+5x-7/4 =0

解

x^{2} + 5 x - \frac{7}{4} = 0

解

x = \frac{- 5 + 4 2}{2}, x = - \frac{5 + 4 2}{2}

+1

十進法表記

x = 0.32842 \dots, x = - 5.32842 \dots

解答ステップ

x^{2} + 5 x - \frac{7}{4} = 0

以下で両辺を乗じる:

4

4 x^{2} + 20 x - 7 = 0

解くとthe二次式

x_{1, 2} = \frac{- 20 \pm 2 0 ^{2} - 4 \cdot 4 ( - 7 )}{2 \cdot 4}

2 0^{2} - 4 \cdot 4 (- 7) = 162

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

解を分離する

x_{1} = \frac{- 20 + 16 2}{2 \cdot 4}, x_{2} = \frac{- 20 - 16 2}{2 \cdot 4}

x = \frac{- 20 + 16 2}{2 \cdot 4} : \frac{- 5 + 4 2}{2}

x = \frac{- 20 - 16 2}{2 \cdot 4} : - \frac{5 + 4 2}{2}

二次equationの解:

x = \frac{- 5 + 4 2}{2}, x = - \frac{5 + 4 2}{2}

グラフ

人気の例

因数 x^2-11x+22=-2

f a c t or x^{2} - 11 x + 22 = - 2

4 x^{2} + 56 x + 144 = 0

x^2+6x+3=-x(x-1)

x^{2} + 6 x + 3 = - x (x - 1)

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

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

solvefor x,6x^2-18x=0

so l v e f or x, 6 x^{2} - 18 x = 0