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 >

(7x-5)(x-2)=7x^2-15x+322

解答

(7 x - 5) (x - 2) = 7 x^{2} - 15 x + 322

解答

x = - 78

求解步骤

(7 x - 5) (x - 2) = 7 x^{2} - 15 x + 322

展开

(7 x - 5) (x - 2) : 7 x^{2} - 19 x + 10

7 x^{2} - 19 x + 10 = 7 x^{2} - 15 x + 322

将

10

到右边

7 x^{2} - 19 x = 7 x^{2} - 15 x + 312

两边减去

7 x^{2} - 15 x

7 x^{2} - 19 x - (7 x^{2} - 15 x) = 7 x^{2} - 15 x + 312 - (7 x^{2} - 15 x)

化简

- 4 x = 312

两边除以

- 4

x = - 78

作图

流行的例子

c - 4 = - 23

solvefor x,y+1=3x

so l v e f or x, y + 1 = 3 x

1.94+5(1.92n+1.84)=0.3(22n-6.2)-2

1.94 + 5 (1.92 n + 1.84) = 0.3 (22 n - 6.2) - 2

5 - 2 x = - 4 x - 7

x - 2 + 3 = - 2