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受欢迎的代数 >

2x^2+13x-24=0

解答

2 x^{2} + 13 x - 24 = 0

解答

x = \frac{3}{2}, x = - 8

+1

十进制

x = 1.5, x = - 8

求解步骤

2 x^{2} + 13 x - 24 = 0

使用求根公式求解

x_{1, 2} = \frac{- 13 \pm 1 3 ^{2} - 4 \cdot 2 ( - 24 )}{2 \cdot 2}

1 3^{2} - 4 \cdot 2 (- 24) = 19

x_{1, 2} = \frac{- 13 \pm 19}{2 \cdot 2}

将解分隔开

x_{1} = \frac{- 13 + 19}{2 \cdot 2}, x_{2} = \frac{- 13 - 19}{2 \cdot 2}

x = \frac{- 13 + 19}{2 \cdot 2} : \frac{3}{2}

x = \frac{- 13 - 19}{2 \cdot 2} : - 8

二次方程组的解是:

x = \frac{3}{2}, x = - 8

作图

流行的例子

x^{2} - 15 x + 50 = 0

4 + 2 d = 8

因式分解 16yx^4+12y^3x^2-20yx

f a c t or 16 y x^{4} + 12 y^{3} x^{2} - 20 y x

e x p an d (x + 3)^{3}

(-1)/2 <(2x+3)/5 < 3/2

\frac{- 1}{2} < \frac{2 x + 3}{5} < \frac{3}{2}