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受欢迎的代数 >

-0.5x^2+3.2x+22=0

解答

- 0.5 x^{2} + 3.2 x + 22 = 0

解答

x = - \frac{2 ( 339 - 8 )}{5}, x = \frac{2 ( 8 + 339 )}{5}

+1

十进制

x = - 4.16478 \dots, x = 10.56478 \dots

求解步骤

- 0.5 x^{2} + 3.2 x + 22 = 0

在两边乘以

10

- 5 x^{2} + 32 x + 220 = 0

使用求根公式求解

x_{1, 2} = \frac{- 32 \pm 3 2 ^{2} - 4 ( - 5 ) \cdot 220}{2 ( - 5 )}

3 2^{2} - 4 (- 5) \cdot 220 = 4339

x_{1, 2} = \frac{- 32 \pm 4 339}{2 ( - 5 )}

将解分隔开

x_{1} = \frac{- 32 + 4 339}{2 ( - 5 )}, x_{2} = \frac{- 32 - 4 339}{2 ( - 5 )}

x = \frac{- 32 + 4 339}{2 ( - 5 )} : - \frac{2 ( 339 - 8 )}{5}

x = \frac{- 32 - 4 339}{2 ( - 5 )} : \frac{2 ( 8 + 339 )}{5}

二次方程组的解是:

x = - \frac{2 ( 339 - 8 )}{5}, x = \frac{2 ( 8 + 339 )}{5}

作图

流行的例子

25 b^{2} - 64 = 0

quadraticformula 3x-2x^2=7

q u a d r a t i c f or m u l a 3 x - 2 x^{2} = 7

w^{2} + 3 w = 10

(x)=1.2x^2-744x+134191

(x) = 1.2 x^{2} - 744 x + 134191

8 a^{2} - 14 a - 15 = 0