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 >

2.985=x^2-1

解答

2.985 = x^{2} - 1

解答

x = \frac{797}{10 2}, x = - \frac{797}{10 2}

+1

十进制

x = 1.99624 \dots, x = - 1.99624 \dots

求解步骤

2.985 = x^{2} - 1

交换两边

x^{2} - 1 = 2.985

将

1

到右边

x^{2} = 3.985

对于

x^{2} = f (a)

解为

x = f (a), - f (a)

x = 3.985, x = - 3.985

3.985 = \frac{797}{10 2}

- 3.985 = - \frac{797}{10 2}

x = \frac{797}{10 2}, x = - \frac{797}{10 2}

作图

流行的例子

x (4 x - 7) = - 3

4(23)x^2-5x+4=9

4 (23) x^{2} - 5 x + 4 = 9

4 (x - 1)^{2} + 2 = 38

x^{2} + 6 = 26

(x^2-1)/4 =(x-1)/3

\frac{x ^{2} - 1}{4} = \frac{x - 1}{3}