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Beliebt Word Problems >

The product of two consecutive integers is 420. Which quadratic equation can be used to find x, the lesser number

Lösung

T h e p ro d u c t o f tw o co n sec u t i v e in t e g ers i s 420. Whi c h q u a d r a t i c e q u a t i o n c an b e u se d t o f in d x, t h e l esser n u mb er

Lösung

The numbers : 20, 21 or - 21, - 20

Schritte zur Lösung

Represent the numbers with

x

:

First number : x

Consecutive number : x + 1

A.T.Q.:

x (x + 1) = 420

Löse

x (x + 1) = 420 : x = 20, x = - 21

Setze ein

x = 20 : 21

Setze ein

x = - 21 : - 20

The numbers : 20, 21 or - 21, - 20

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