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 >

-16t^2+70t-55=0

解答

- 16 t^{2} + 70 t - 55 = 0

解答

t = \frac{35 - 345}{16}, t = \frac{35 + 345}{16}

+1

十进制

t = 1.02661 \dots, t = 3.34838 \dots

求解步骤

- 16 t^{2} + 70 t - 55 = 0

使用求根公式求解

t_{1, 2} = \frac{- 70 \pm 7 0 ^{2} - 4 ( - 16 ) ( - 55 )}{2 ( - 16 )}

7 0^{2} - 4 (- 16) (- 55) = 2345

t_{1, 2} = \frac{- 70 \pm 2 345}{2 ( - 16 )}

将解分隔开

t_{1} = \frac{- 70 + 2 345}{2 ( - 16 )}, t_{2} = \frac{- 70 - 2 345}{2 ( - 16 )}

t = \frac{- 70 + 2 345}{2 ( - 16 )} : \frac{35 - 345}{16}

t = \frac{- 70 - 2 345}{2 ( - 16 )} : \frac{35 + 345}{16}

二次方程组的解是:

t = \frac{35 - 345}{16}, t = \frac{35 + 345}{16}

作图

流行的例子

4 (2 y + 6) = - 4 y

25 x^{2} = 4

- 2 (x + 4) + 6 = - 3

3 x - 4 > x + 6

5/4+(3x)/2 =(7x)/6

\frac{5}{4} + \frac{3 x}{2} = \frac{7 x}{6}