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 >

A(x)=0.45x^2-41x+1059

解答

A (x) = 0.45 x^{2} - 41 x + 1059

解答

x = \frac{4100 + 100 A + 10000 A ^{2} + 820000 A - 2252000}{90}, x = \frac{4100 + 100 A - 10000 A ^{2} + 820000 A - 2252000}{90}

求解步骤

A (x) = 0.45 x^{2} - 41 x + 1059

在两边乘以

100

A x \cdot 100 = 45 x^{2} - 4100 x + 105900

交换两边

45 x^{2} - 4100 x + 105900 = A x \cdot 100

将

A x 100

para o lado esquerdo

45 x^{2} - 4100 x + 105900 - A x \cdot 100 = 0

改写成标准形式

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

45 x^{2} - (4100 + A \cdot 100) x + 105900 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 4100 - A \cdot 100 ) \pm ( - 4100 - A \cdot 100 ) ^{2} - 4 \cdot 45 \cdot 105900}{2 \cdot 45}

化简

(- 4100 - A \cdot 100)^{2} - 4 \cdot 45 \cdot 105900 : 10000 A^{2} + 820000 A - 2252000

x_{1, 2} = \frac{- ( - 4100 - A \cdot 100 ) \pm 10000 A ^{2} + 820000 A - 2252000}{2 \cdot 45}

将解分隔开

x_{1} = \frac{- ( - 4100 - A \cdot 100 ) + 10000 A ^{2} + 820000 A - 2252000}{2 \cdot 45}, x_{2} = \frac{- ( - 4100 - A \cdot 100 ) - 10000 A ^{2} + 820000 A - 2252000}{2 \cdot 45}

x = \frac{- ( - 4100 - A 100 ) + 10000 A ^{2} + 820000 A - 2252000}{2 \cdot 45} : \frac{4100 + 100 A + 10000 A ^{2} + 820000 A - 2252000}{90}

x = \frac{- ( - 4100 - A 100 ) - 10000 A ^{2} + 820000 A - 2252000}{2 \cdot 45} : \frac{4100 + 100 A - 10000 A ^{2} + 820000 A - 2252000}{90}

二次方程组的解是:

x = \frac{4100 + 100 A + 10000 A ^{2} + 820000 A - 2252000}{90}, x = \frac{4100 + 100 A - 10000 A ^{2} + 820000 A - 2252000}{90}

作图

流行的例子

x^{2} + 2 x - 300 = 0

x^{2} = 56 - x

3/2 (4x^2-20x+60)=0

\frac{3}{2} (4 x^{2} - 20 x + 60) = 0

x^{2} - 5 a + 8 x = 0

solvefor t,g(t-1)=5-(t-1)^2

so l v e f or t, g (t - 1) = 5 - (t - 1)^{2}