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人気のある代数 >

9x^2+14x-15=0

解

9 x^{2} + 14 x - 15 = 0

解

x = \frac{- 7 + 2 46}{9}, x = - \frac{7 + 2 46}{9}

+1

十進法表記

x = 0.72940 \dots, x = - 2.28496 \dots

解答ステップ

9 x^{2} + 14 x - 15 = 0

解くとthe二次式

x_{1, 2} = \frac{- 14 \pm 1 4 ^{2} - 4 \cdot 9 ( - 15 )}{2 \cdot 9}

1 4^{2} - 4 \cdot 9 (- 15) = 446

x_{1, 2} = \frac{- 14 \pm 4 46}{2 \cdot 9}

解を分離する

x_{1} = \frac{- 14 + 4 46}{2 \cdot 9}, x_{2} = \frac{- 14 - 4 46}{2 \cdot 9}

x = \frac{- 14 + 4 46}{2 \cdot 9} : \frac{- 7 + 2 46}{9}

x = \frac{- 14 - 4 46}{2 \cdot 9} : - \frac{7 + 2 46}{9}

二次equationの解:

x = \frac{- 7 + 2 46}{9}, x = - \frac{7 + 2 46}{9}

グラフ

人気の例

v^{2} = - 3

因数 25x^2-25x=-6

f a c t or 25 x^{2} - 25 x = - 6

solvefor y,x^2+4xy+16y^2=27

so l v e f or y, x^{2} + 4 x y + 16 y^{2} = 27

(x-1)^2=-(x+1)^2+4

(x - 1)^{2} = - (x + 1)^{2} + 4

y^2-2y+(1+4pi^2)=0

y^{2} - 2 y + (1 + 4 π^{2}) = 0