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受欢迎的代数 >

3x^2+13x+14=2

解答

3 x^{2} + 13 x + 14 = 2

解答

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

+1

十进制

x = - 1.33333 \dots, x = - 3

求解步骤

3 x^{2} + 13 x + 14 = 2

将

2

para o lado esquerdo

3 x^{2} + 13 x + 12 = 0

使用求根公式求解

x_{1, 2} = \frac{- 13 \pm 1 3 ^{2} - 4 \cdot 3 \cdot 12}{2 \cdot 3}

1 3^{2} - 4 \cdot 3 \cdot 12 = 5

x_{1, 2} = \frac{- 13 \pm 5}{2 \cdot 3}

将解分隔开

x_{1} = \frac{- 13 + 5}{2 \cdot 3}, x_{2} = \frac{- 13 - 5}{2 \cdot 3}

x = \frac{- 13 + 5}{2 \cdot 3} : - \frac{4}{3}

x = \frac{- 13 - 5}{2 \cdot 3} : - 3

二次方程组的解是:

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

作图

流行的例子

5 y^{2} = - 9 y - 4

0 = 3 x^{2} - 2 x + 1

7 c^{2} = 100

X^{2} + 3 = 0

4.9t^2-70t+50=0

4.9 t^{2} - 70 t + 50 = 0