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 >

w^2-1/15 w= 2/15

解答

w^{2} - \frac{1}{15} w = \frac{2}{15}

解答

w = \frac{2}{5}, w = - \frac{1}{3}

+1

十进制

w = 0.4, w = - 0.33333 \dots

求解步骤

w^{2} - \frac{1}{15} w = \frac{2}{15}

在两边乘以

15

15 w^{2} - w = 2

将

2

para o lado esquerdo

15 w^{2} - w - 2 = 0

使用求根公式求解

w_{1, 2} = \frac{- ( - 1 ) \pm ( - 1 ) ^{2} - 4 \cdot 15 ( - 2 )}{2 \cdot 15}

(- 1)^{2} - 4 \cdot 15 (- 2) = 11

w_{1, 2} = \frac{- ( - 1 ) \pm 11}{2 \cdot 15}

将解分隔开

w_{1} = \frac{- ( - 1 ) + 11}{2 \cdot 15}, w_{2} = \frac{- ( - 1 ) - 11}{2 \cdot 15}

w = \frac{- ( - 1 ) + 11}{2 \cdot 15} : \frac{2}{5}

w = \frac{- ( - 1 ) - 11}{2 \cdot 15} : - \frac{1}{3}

二次方程组的解是:

w = \frac{2}{5}, w = - \frac{1}{3}

作图

流行的例子

completesquare x^2+5x

co m pl e t es q u a re x^{2} + 5 x

solvefor x,y^3=x^2

so l v e f or x, y^{3} = x^{2}

(2 x + 4)^{2} = 100

x^{2} + 8 x + 16 = 64

2 x^{2} - x + 5 = 0