en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular Word Problems >

The square of a negative number is 21 more than 4 times the negative number

Solution

T h e s q u a re o f a n e g a t i v e n u mb er i s 21 m ore t han 4 t im es t h e n e g a t i v e n u mb er

Solution

The number : - 3

Solution steps

Represent the number with

x

A.T.Q.:

x^{2} = 21 + 4 x

Solve for

x, x^{2} = 21 + 4 x : x = 7, x = - 3

Select negative solutions:

- 3

The number : - 3

Popular Examples

the sum of two numbers The sum of two consecutive even integers is-30 A savings account earns an interest rate of 3.75% compounded semi-annually for an account with an initial deposit of 895. How much money will be in the account after 10 years? Round your answer to the nearest hundredth.Brenda invests 23,493.81 in a savings account with a fixed annual interest rate of 2.57 % compounded semi-annually. What will the account balance be after 9 years?156% of what number is 29