zs

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

受欢迎的 Word Problems >

If a number is subtracted from five times its square, the result is four. Find all such numbers.

解答

I f a n u mb er i s s u b t r a c t e d f ro m f i v e t im es i t s s q u a re, t h e res u lt i s f o u r . F in d a ll s u c h n u mb ers .

解答

The number : 1 or - \frac{4}{5}

求解步骤

Represent the number with

x

A.T.Q.:

5 x^{2} - x = 4

求解

x, 5 x^{2} - x = 4 : x = 1, x = - \frac{4}{5}

The number : 1 or - \frac{4}{5}

流行的例子

If you borrow $12000 for 6 years at an annual interest rate of 6.5% , what is the total amount of money you will pay back?Five times the sum of a number and 7 equals 8 the sum of two consecutive even numbers is 46. What are the two numbers?0.75 of what number is 24 the sum of a number and two is twice the number