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 >

121x^2-462x+441=360-72x

解答

121 x^{2} - 462 x + 441 = 360 - 72 x

解答

x = 3, x = \frac{27}{121}

+1

十进制

x = 3, x = 0.22314 \dots

求解步骤

121 x^{2} - 462 x + 441 = 360 - 72 x

将

72 x

para o lado esquerdo

121 x^{2} - 390 x + 441 = 360

将

360

para o lado esquerdo

121 x^{2} - 390 x + 81 = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 390 ) \pm ( - 390 ) ^{2} - 4 \cdot 121 \cdot 81}{2 \cdot 121}

(- 390)^{2} - 4 \cdot 121 \cdot 81 = 336

x_{1, 2} = \frac{- ( - 390 ) \pm 336}{2 \cdot 121}

将解分隔开

x_{1} = \frac{- ( - 390 ) + 336}{2 \cdot 121}, x_{2} = \frac{- ( - 390 ) - 336}{2 \cdot 121}

x = \frac{- ( - 390 ) + 336}{2 \cdot 121} : 3

x = \frac{- ( - 390 ) - 336}{2 \cdot 121} : \frac{27}{121}

二次方程组的解是:

x = 3, x = \frac{27}{121}

作图

流行的例子

- 10 x^{2} + 180 = 0

6 x^{2} - 10 x - 19 = 0

solvefor x,f(x+h)=3x^2+4x-2

so l v e f or x, f (x + h) = 3 x^{2} + 4 x - 2

solvefor x,(y-x-2)^2=9x

so l v e f or x, (y - x - 2)^{2} = 9 x

(1+x)^2-1=100x^2

(1 + x)^{2} - 1 = 100 x^{2}