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人気のある代数 >

-x^2-12x+9=0

解

- x^{2} - 12 x + 9 = 0

解

x = - 3 (2 + 5), x = 3 (5 - 2)

+1

十進法表記

x = - 12.70820 \dots, x = 0.70820 \dots

解答ステップ

- x^{2} - 12 x + 9 = 0

解くとthe二次式

x_{1, 2} = \frac{- ( - 12 ) \pm ( - 12 ) ^{2} - 4 ( - 1 ) \cdot 9}{2 ( - 1 )}

(- 12)^{2} - 4 (- 1) \cdot 9 = 65

x_{1, 2} = \frac{- ( - 12 ) \pm 6 5}{2 ( - 1 )}

解を分離する

x_{1} = \frac{- ( - 12 ) + 6 5}{2 ( - 1 )}, x_{2} = \frac{- ( - 12 ) - 6 5}{2 ( - 1 )}

x = \frac{- ( - 12 ) + 6 5}{2 ( - 1 )} : - 3 (2 + 5)

x = \frac{- ( - 12 ) - 6 5}{2 ( - 1 )} : 3 (5 - 2)

二次equationの解:

x = - 3 (2 + 5), x = 3 (5 - 2)

グラフ

人気の例

t^{2} - 8 t + 10 = 0

solvefor x,f=(5m-10)2x^2+3x+4

so l v e f or x, f = (5 m - 10) 2 x^{2} + 3 x + 4

a^{2} + 2 0^{2} = 2 5^{2}

3x^2+64=(2x^2)/2

3 x^{2} + 64 = \frac{2 x ^{2}}{2}

3 x^{2} + 4 x - 12 = 13