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人気のある代数 >

x^2+9x-3b=0

解

x^{2} + 9 x - 3 b = 0

解

x = \frac{- 9 + 81 + 12 b}{2}, x = \frac{- 9 - 81 + 12 b}{2}

解答ステップ

x^{2} + 9 x - 3 b = 0

解くとthe二次式

x_{1, 2} = \frac{- 9 \pm 9 ^{2} - 4 \cdot 1 \cdot ( - 3 b )}{2 \cdot 1}

簡素化

9^{2} - 4 \cdot 1 \cdot (- 3 b) : 81 + 12 b

x_{1, 2} = \frac{- 9 \pm 81 + 12 b}{2 \cdot 1}

解を分離する

x_{1} = \frac{- 9 + 81 + 12 b}{2 \cdot 1}, x_{2} = \frac{- 9 - 81 + 12 b}{2 \cdot 1}

x = \frac{- 9 + 81 + 12 b}{2 \cdot 1} : \frac{- 9 + 81 + 12 b}{2}

x = \frac{- 9 - 81 + 12 b}{2 \cdot 1} : \frac{- 9 - 81 + 12 b}{2}

二次equationの解:

x = \frac{- 9 + 81 + 12 b}{2}, x = \frac{- 9 - 81 + 12 b}{2}

グラフ

人気の例

solvefor x,428x x/y =12.24

so l v e f or x, 428 x \frac{x}{y} = 12.24

solvefor x,p^2-y^2*q=x^2-y^2

so l v e f or x, p^{2} - y^{2} \cdot q = x^{2} - y^{2}

4z^2+4(m-1)*z+m^2-3m=0

4 z^{2} + 4 (m - 1) \cdot z + m^{2} - 3 m = 0

(k+1)x^2-2(k-1)x+1=0

(k + 1) x^{2} - 2 (k - 1) x + 1 = 0

3 t^{2} - \frac{1}{2} = 0