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-9)^2+x^2=(x+9)^2

解答

(x - 9)^{2} + x^{2} = (x + 9)^{2}

解答

x = 36, x = 0

求解步骤

(x - 9)^{2} + x^{2} = (x + 9)^{2}

展开

(x - 9)^{2} + x^{2} : 2 x^{2} - 18 x + 81

展开

(x + 9)^{2} : x^{2} + 18 x + 81

2 x^{2} - 18 x + 81 = x^{2} + 18 x + 81

将

81

para o lado esquerdo

2 x^{2} - 18 x = x^{2} + 18 x

将

18 x

para o lado esquerdo

2 x^{2} - 36 x = x^{2}

将

x^{2}

para o lado esquerdo

x^{2} - 36 x = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 36 ) \pm ( - 36 ) ^{2} - 4 \cdot 1 \cdot 0}{2 \cdot 1}

(- 36)^{2} - 4 \cdot 1 \cdot 0 = 36

x_{1, 2} = \frac{- ( - 36 ) \pm 36}{2 \cdot 1}

将解分隔开

x_{1} = \frac{- ( - 36 ) + 36}{2 \cdot 1}, x_{2} = \frac{- ( - 36 ) - 36}{2 \cdot 1}

x = \frac{- ( - 36 ) + 36}{2 \cdot 1} : 36

x = \frac{- ( - 36 ) - 36}{2 \cdot 1} : 0

二次方程组的解是:

x = 36, x = 0

作图

流行的例子

化简 1/(8^{-2)}

s im pl i f y \frac{1}{8 ^{- 2}}

化简 (3^2)/4*(2^3)/2*(2^3)/3

s im pl i f y \frac{3 ^{2}}{4} \cdot \frac{2 ^{3}}{2} \cdot \frac{2 ^{3}}{3}

2 x^{2} - 5 x + 32 = 7

2 x^{2} - 0.45 x - 3 = 0

因式分解-5x^3+6x^2+15x-18

f a c t or - 5 x^{3} + 6 x^{2} + 15 x - 18