The product of two consecutive negative odd integers is 15. Find the value of the greater integer.

解

T h e p ro d u c t o f tw o co n sec u t i v e n e g a t i v e o dd in t e g ers i s 15. F in d t h e v a l u e o f t h e g re a t er in t e g er .

The largest number : - 3

解答ステップ

Represent the numbers with

x

First number : x

Consecutive number : x + 2

A.T.Q.:

x (x + 2) = 15

解く

x (x + 2) = 15 : x = 3, x = - 5

Select negative solutions:

- 5

x + 2 = - 5 + 2 = - 3

Select the largest solution:

- 3

The largest number : - 3