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 >

n^2=-10+7n

解答

n^{2} = - 10 + 7 n

解答

n = 5, n = 2

求解步骤

n^{2} = - 10 + 7 n

将

7 n

para o lado esquerdo

n^{2} - 7 n = - 10

将

10

para o lado esquerdo

n^{2} - 7 n + 10 = 0

使用求根公式求解

n_{1, 2} = \frac{- ( - 7 ) \pm ( - 7 ) ^{2} - 4 \cdot 1 \cdot 10}{2 \cdot 1}

(- 7)^{2} - 4 \cdot 1 \cdot 10 = 3

n_{1, 2} = \frac{- ( - 7 ) \pm 3}{2 \cdot 1}

将解分隔开

n_{1} = \frac{- ( - 7 ) + 3}{2 \cdot 1}, n_{2} = \frac{- ( - 7 ) - 3}{2 \cdot 1}

n = \frac{- ( - 7 ) + 3}{2 \cdot 1} : 5

n = \frac{- ( - 7 ) - 3}{2 \cdot 1} : 2

二次方程组的解是:

n = 5, n = 2

作图

流行的例子

(17x-1)^2-3(17x-1)-4=0

(17 x - 1)^{2} - 3 (17 x - 1) - 4 = 0

x^2-0.75x+0.125=0

x^{2} - 0.75 x + 0.125 = 0

9 x^{2} - 16 x + 4 = 0

- 3 x^{2} - 3 x + 10 = 0

6x^2+10x+11=x^2

6 x^{2} + 10 x + 11 = x^{2}