vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

The sum of two numbers is 20 , and the hiệu between their squares is 40:Find the two numbers.

Lời Giải

T h e s u m o f tw o n u mb ers i s 20, an d t h e d i ff ere n ce b e tw ee n t h e i r s q u a res i s 40 : F in d t h e tw o n u mb ers .

Lời Giải

The numbers : 11, 9

Các bước giải pháp

Represent the numbers with

x and y

:

number 1 : x

number 2 : y

A.T.Q.:

x + y = 20

x^{2} - y^{2} = 40

Giải hệ phương trình:

x + y = 20, x^{2} - y^{2} = 40 : (x = 11, y = 9)

The numbers : 11, 9

Ví dụ phổ biến

Last year 90 schools participated in the State Spelling Bee. This year there were 20% more schools participating than last year. How many schools participated in the spelling bee this year?Suppose you draw one card from a standard 52-card deck. What is the probability that it is a red or a Jack?Mina is twice as old as Marko. The sum of their ages is 45.The sum of three numbers is 149. The third number is 4 times the second. The first number is 5 more than the second. What are the numbers?61 decreased by twice a number