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 >

4q^2-17q+8=-2q

解答

4 q^{2} - 17 q + 8 = - 2 q

解答

q = \frac{15 + 97}{8}, q = \frac{15 - 97}{8}

+1

十进制

q = 3.10610 \dots, q = 0.64389 \dots

求解步骤

4 q^{2} - 17 q + 8 = - 2 q

将

2 q

para o lado esquerdo

4 q^{2} - 15 q + 8 = 0

使用求根公式求解

q_{1, 2} = \frac{- ( - 15 ) \pm ( - 15 ) ^{2} - 4 \cdot 4 \cdot 8}{2 \cdot 4}

(- 15)^{2} - 4 \cdot 4 \cdot 8 = 97

q_{1, 2} = \frac{- ( - 15 ) \pm 97}{2 \cdot 4}

将解分隔开

q_{1} = \frac{- ( - 15 ) + 97}{2 \cdot 4}, q_{2} = \frac{- ( - 15 ) - 97}{2 \cdot 4}

q = \frac{- ( - 15 ) + 97}{2 \cdot 4} : \frac{15 + 97}{8}

q = \frac{- ( - 15 ) - 97}{2 \cdot 4} : \frac{15 - 97}{8}

二次方程组的解是:

q = \frac{15 + 97}{8}, q = \frac{15 - 97}{8}

作图

流行的例子

7 x^{2} = x

4 x^{2} - (2 - k)^{2} = 0

solvefor v,F=(mv^2)/R

so l v e f or v, F = \frac{m v ^{2}}{R}

solvefor x,2x^2+y^2=c

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

2 x^{2} - 18 x = 40