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 >

The square of a number added to three times the number is 28 . Find the number.

解答

T h e s q u a re o f a n u mb er a dd e d t o t h ree t im es t h e n u mb er i s 28 . F in d t h e n u mb er .

解答

The number : \frac{7}{2} or - \frac{7}{2}

求解步骤

Represent the number with

x

A.T.Q.:

(x + 3 x)^{2} = 28

求解

x, (x + 3 x)^{2} = 28 : x = \frac{7}{2}, x = - \frac{7}{2}

The number : \frac{7}{2} or - \frac{7}{2}

流行的例子

Kaylee invested 910 in an account paying an interest rate of 2.6% compounded quarterly. Assuming no deposits or withdrawals are made, how much money, to the nearest dollar, would be in the account after 10 years?Sarah ate 2 apples. Alex ate 7 apples. How many apples did Sarah and Alex eat?Braden has 700 in an account that earns 10% interest compounded annually.To the nearest cent, how much will he have in 3 years?The sum of 2 numbers is 621, and their 差集 is 109. Find the two numbers The sum of three times a number and six is nine.