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人気のある代数 >

(2x-7)(x+3)=4

解

(2 x - 7) (x + 3) = 4

解

x = \frac{1 + 201}{4}, x = \frac{1 - 201}{4}

+1

十進法表記

x = 3.79436 \dots, x = - 3.29436 \dots

解答ステップ

(2 x - 7) (x + 3) = 4

拡張

(2 x - 7) (x + 3) : 2 x^{2} - x - 21

2 x^{2} - x - 21 = 4

4

を左側に移動します

2 x^{2} - x - 25 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 2 ( - 25 )}{2 \cdot 2}

(- 1)^{2} - 4 \cdot 2 (- 25) = 201

x_{1, 2} = \frac{- ( - 1 ) \pm 201}{2 \cdot 2}

解を分離する

x_{1} = \frac{- ( - 1 ) + 201}{2 \cdot 2}, x_{2} = \frac{- ( - 1 ) - 201}{2 \cdot 2}

x = \frac{- ( - 1 ) + 201}{2 \cdot 2} : \frac{1 + 201}{4}

x = \frac{- ( - 1 ) - 201}{2 \cdot 2} : \frac{1 - 201}{4}

二次equationの解:

x = \frac{1 + 201}{4}, x = \frac{1 - 201}{4}

グラフ

人気の例

-5(x)^2-5x+200=0

- 5 (x)^{2} - 5 x + 200 = 0

- 2 x^{2} + 8 = 6 x

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

n (n - 3) = 54

n (n - 3) = 70