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受欢迎的代数 >

3v^2+10v+1=v

解答

3 v^{2} + 10 v + 1 = v

解答

v = \frac{- 9 + 69}{6}, v = \frac{- 9 - 69}{6}

+1

十进制

v = - 0.11556 \dots, v = - 2.88443 \dots

求解步骤

3 v^{2} + 10 v + 1 = v

将

v

para o lado esquerdo

3 v^{2} + 9 v + 1 = 0

使用求根公式求解

v_{1, 2} = \frac{- 9 \pm 9 ^{2} - 4 \cdot 3 \cdot 1}{2 \cdot 3}

9^{2} - 4 \cdot 3 \cdot 1 = 69

v_{1, 2} = \frac{- 9 \pm 69}{2 \cdot 3}

将解分隔开

v_{1} = \frac{- 9 + 69}{2 \cdot 3}, v_{2} = \frac{- 9 - 69}{2 \cdot 3}

v = \frac{- 9 + 69}{2 \cdot 3} : \frac{- 9 + 69}{6}

v = \frac{- 9 - 69}{2 \cdot 3} : \frac{- 9 - 69}{6}

二次方程组的解是:

v = \frac{- 9 + 69}{6}, v = \frac{- 9 - 69}{6}

作图

流行的例子

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