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+3× (-28)=0

解答

x^{2} + 3 \cdot (- 28) = 0

解答

x = 221, x = - 221

+1

十进制

x = 9.16515 \dots, x = - 9.16515 \dots

求解步骤

x^{2} + 3 (- 28) = 0

展开

x^{2} + 3 (- 28) : x^{2} - 84

x^{2} - 84 = 0

将

84

到右边

x^{2} = 84

对于

x^{2} = f (a)

解为

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

x = 84, x = - 84

84 = 221

- 84 = - 221

x = 221, x = - 221

作图

流行的例子

solvefor y,e^{sqrt(y)}=x^2

so l v e f or y, e^{y} = x^{2}

(x) (x) = 2 x

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

completesquare x^2-4x-2=0

co m pl e t es q u a re x^{2} - 4 x - 2 = 0

- 3 x^{2} + 12 x + 4 = 0