zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的代数 >

85=175x-16x^2

解答

85 = 175 x - 16 x^{2}

解答

x = \frac{175 - 25185}{32}, x = \frac{175 + 25185}{32}

+1

十进制

x = 0.50944 \dots, x = 10.42805 \dots

求解步骤

85 = 175 x - 16 x^{2}

交换两边

175 x - 16 x^{2} = 85

将

85

para o lado esquerdo

175 x - 16 x^{2} - 85 = 0

改写成标准形式

a x^{2} + b x + c = 0

- 16 x^{2} + 175 x - 85 = 0

使用求根公式求解

x_{1, 2} = \frac{- 175 \pm 17 5 ^{2} - 4 ( - 16 ) ( - 85 )}{2 ( - 16 )}

17 5^{2} - 4 (- 16) (- 85) = 25185

x_{1, 2} = \frac{- 175 \pm 25185}{2 ( - 16 )}

将解分隔开

x_{1} = \frac{- 175 + 25185}{2 ( - 16 )}, x_{2} = \frac{- 175 - 25185}{2 ( - 16 )}

x = \frac{- 175 + 25185}{2 ( - 16 )} : \frac{175 - 25185}{32}

x = \frac{- 175 - 25185}{2 ( - 16 )} : \frac{175 + 25185}{32}

二次方程组的解是:

x = \frac{175 - 25185}{32}, x = \frac{175 + 25185}{32}

作图

流行的例子

因式分解 x^3-6x^2+2x-12

f a c t or x^{3} - 6 x^{2} + 2 x - 12

2 k^{2} + k - 6 = 0

化简 2/7-3/(2b)

s im pl i f y \frac{2}{7} - \frac{3}{2 b}

x^2-3.2x+2.56-0.0909090909=0

x^{2} - 3.2 x + 2.56 - 0.0909090909 = 0

5 x^{2} + 8 x \leq 4