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受欢迎的代数 >

3x^2+13x+4=0

解答

3 x^{2} + 13 x + 4 = 0

解答

x = - \frac{1}{3}, x = - 4

+1

十进制

x = - 0.33333 \dots, x = - 4

求解步骤

3 x^{2} + 13 x + 4 = 0

使用求根公式求解

x_{1, 2} = \frac{- 13 \pm 1 3 ^{2} - 4 \cdot 3 \cdot 4}{2 \cdot 3}

1 3^{2} - 4 \cdot 3 \cdot 4 = 11

x_{1, 2} = \frac{- 13 \pm 11}{2 \cdot 3}

将解分隔开

x_{1} = \frac{- 13 + 11}{2 \cdot 3}, x_{2} = \frac{- 13 - 11}{2 \cdot 3}

x = \frac{- 13 + 11}{2 \cdot 3} : - \frac{1}{3}

x = \frac{- 13 - 11}{2 \cdot 3} : - 4

二次方程组的解是:

x = - \frac{1}{3}, x = - 4

作图

流行的例子

化简 (t^{-1/2})^2

s im pl i f y (t^{- \frac{1}{2}})^{2}

u^{2} = - 81

x^{2} - 6 x - 14 = 0

4 ∣ 6 + 2 s ∣ - 27 \leq - 3

8(-2x-4)+12=-52

8 (- 2 x - 4) + 12 = - 52