The first solution doesn't satisfy | Olympiad Mathematics

[@ghaidabarghouthi1403]

Should divide both sides by 2 from the first step.

[@АндрейПергаев-з4н]

Куча не нужных действий
Если учесть что (sqrt x)^2=x
То легко можно получить
Sqrt x=2.
х=4
Максимум 1 минута, а не 5 минут

[@iqbalmaqsood8720]

you are there to teach OR confuse. A very simple solution can get the answer

[@mmm-o8w4i]

(2x÷√x)^2=4^2
4x^2÷x=16
4x^2=16x
x^2=4x
x^2÷x=4
x=4✓

[@RyanLewis-Johnson-wq6xs]

(2x)/Sqrt[x] x=4 (2(4))/Sqrt[4]=4 4=4 solution

[@PhilCoolMath]

@@RyanLewis-Johnson-wq6xs correct 👍

[@predmestinanataliivan]

​@@PhilCoolMath
Я а уме решила

[@mindless-pedant]

Why can't 0 = 0?

[@ORCODEMONE]

4

[@user-bq2qq5hy8f]

2.2=4

[@mrhaki1962]

Fallait définir le domaine de définition de l'équation avant de la résoudre.

[@dardoburgos3179]

Muy sencillo, x= 4.

[@DedMatveev]

x/Vx=Vx => 2Vx=4 => Vx=2 => x=4 that's all.

[@PhilCoolMath]

@@DedMatveev correct 👍

[@harrymatabal8448]

Learn from Ryan Williams comment. His method outweighs yours. A.H.

[@user-bq2qq5hy8f]

Why such analysis 😸

[@craigthomas2497]

Pedantry; BTW the original equation is not a quadratic, it simplifies to sqrrtX =2 so X=4 which is the one single answer her came up with. Kind of dumb.

[@pkgupts1153]

1

[@PhilCoolMath]

@@pkgupts1153 not really 😏

[@harrymatabal8448]

Stupid x cannot be zero, division by zero is inadmissible

[@azizgaouz8363]

Tu es nul en math