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 >

m^2-14m-1=0

解答

m^{2} - 14 m - 1 = 0

解答

m = 7 + 52, m = 7 - 52

+1

十进制

m = 14.07106 \dots, m = - 0.07106 \dots

求解步骤

m^{2} - 14 m - 1 = 0

使用求根公式求解

m_{1, 2} = \frac{- ( - 14 ) \pm ( - 14 ) ^{2} - 4 \cdot 1 \cdot ( - 1 )}{2 \cdot 1}

(- 14)^{2} - 4 \cdot 1 \cdot (- 1) = 102

m_{1, 2} = \frac{- ( - 14 ) \pm 10 2}{2 \cdot 1}

将解分隔开

m_{1} = \frac{- ( - 14 ) + 10 2}{2 \cdot 1}, m_{2} = \frac{- ( - 14 ) - 10 2}{2 \cdot 1}

m = \frac{- ( - 14 ) + 10 2}{2 \cdot 1} : 7 + 52

m = \frac{- ( - 14 ) - 10 2}{2 \cdot 1} : 7 - 52

二次方程组的解是:

m = 7 + 52, m = 7 - 52

作图

流行的例子

c^{2} + 4 = 4 c

0.5 x (x + 1) = - 1

d^{0.4}x(x-1)-3(x^2-5)-x^2=(x-3)-(x+4)

d^{0.4} x (x - 1) - 3 (x^{2} - 5) - x^{2} = (x - 3) - (x + 4)

solvefor x,f(x+h)=x^2+h

so l v e f or x, f (x + h) = x^{2} + h

-332.65=(0.0004)x^2-0.7281x

- 332.65 = (0.0004) x^{2} - 0.7281 x