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受欢迎的代数 >

3v^2+27v=0

解答

3 v^{2} + 27 v = 0

解答

v = 0, v = - 9

求解步骤

3 v^{2} + 27 v = 0

使用求根公式求解

v_{1, 2} = \frac{- 27 \pm 2 7 ^{2} - 4 \cdot 3 \cdot 0}{2 \cdot 3}

2 7^{2} - 4 \cdot 3 \cdot 0 = 27

v_{1, 2} = \frac{- 27 \pm 27}{2 \cdot 3}

将解分隔开

v_{1} = \frac{- 27 + 27}{2 \cdot 3}, v_{2} = \frac{- 27 - 27}{2 \cdot 3}

v = \frac{- 27 + 27}{2 \cdot 3} : 0

v = \frac{- 27 - 27}{2 \cdot 3} : - 9

二次方程组的解是:

v = 0, v = - 9

作图

流行的例子

x^{2} + 10 x + 25 = - 9

x^{2} = 1 3^{2} + 1 2^{2}

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

- 5 x^{2} - 7 x + 6 = 0

solvefor y,y^2=x^3-4x^2-25x+28

so l v e f or y, y^{2} = x^{3} - 4 x^{2} - 25 x + 28