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Phổ biến Word Problems >

Find 3 consecutive even integers such that the sum of the squares of the first and second less the square of the third is 240

Lời Giải

F in d 3 co n sec u t i v e e v e n in t e g ers s u c h t ha t t h e s u m o f t h e s q u a res o f t h e f i rs t an d seco n d l ess t h e s q u a re o f t h e t hi r d i s 240

Lời Giải

Kh \overset{o}{^} ng c \overset{o}{ˊ} nghi ệ m

Các bước giải pháp

Represent the numbers with

x

:

First number : x

Consecutive number 1 : x + 2

Consecutive number 2 : x + 4

A.T.Q.:

2 + (- (x + 4)^{2})^{2} = 240

Giải

2 + (- (x + 4)^{2})^{2} = 240 : x = 4238 - 4, x = - 4238 - 4

Thay

x = 4238 - 4 :

Không hợp lệ

Thay

x = - 4238 - 4 :

Không hợp lệ

Kh \overset{o}{^} ng c \overset{o}{ˊ} nghi ệ m

Ví dụ phổ biến

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