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人気のある代数 >

-3x^2-6x+15=0

解

- 3 x^{2} - 6 x + 15 = 0

解

x = - 1 - 6, x = 6 - 1

+1

十進法表記

x = - 3.44948 \dots, x = 1.44948 \dots

解答ステップ

- 3 x^{2} - 6 x + 15 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 6 ) \pm ( - 6 ) ^{2} - 4 ( - 3 ) \cdot 15}{2 ( - 3 )}

(- 6)^{2} - 4 (- 3) \cdot 15 = 66

x_{1, 2} = \frac{- ( - 6 ) \pm 6 6}{2 ( - 3 )}

解を分離する

x_{1} = \frac{- ( - 6 ) + 6 6}{2 ( - 3 )}, x_{2} = \frac{- ( - 6 ) - 6 6}{2 ( - 3 )}

x = \frac{- ( - 6 ) + 6 6}{2 ( - 3 )} : - 1 - 6

x = \frac{- ( - 6 ) - 6 6}{2 ( - 3 )} : 6 - 1

二次equationの解:

x = - 1 - 6, x = 6 - 1

グラフ

人気の例

x^{2} + 2 x = 14

x^{2} = \frac{4 x + 3}{4}

v^{2} - 7 v + 6 = 0

6 x + x^{2} + 9 = 0

completesquare-x^2+5x+2

co m pl e t es q u a re - x^{2} + 5 x + 2