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 >

x^2-16x+53=-x-3

解答

x^{2} - 16 x + 53 = - x - 3

解答

x = 8, x = 7

求解步骤

x^{2} - 16 x + 53 = - x - 3

将

3

para o lado esquerdo

x^{2} - 16 x + 56 = - x

将

x

para o lado esquerdo

x^{2} - 15 x + 56 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 1 \cdot 56}{2 \cdot 1}

(- 15)^{2} - 4 \cdot 1 \cdot 56 = 1

x_{1, 2} = \frac{- ( - 15 ) \pm 1}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 15 ) + 1}{2 \cdot 1}, x_{2} = \frac{- ( - 15 ) - 1}{2 \cdot 1}

x = \frac{- ( - 15 ) + 1}{2 \cdot 1} : 8

x = \frac{- ( - 15 ) - 1}{2 \cdot 1} : 7

二次方程组的解是:

x = 8, x = 7

作图

流行的例子

48 - 2 x - x^{2} = 0

ax^2-x-a^2x+a=0

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

x^{2} - 5 x - 1 = - 1

M=(x+1)^2+(x-1)^2-2

M = (x + 1)^{2} + (x - 1)^{2} - 2

solvefor x,y=4-((x-2)^2)/4

so l v e f or x, y = 4 - \frac{( x - 2 ) ^{2}}{4}