Harvard University Admission Entrance Tricks | X=?

[@chrisisbell3080]

The overall square on the left hand side of the equation is missing on the video's thumbnail.

[@raghvendrasingh1289]

Let y = x^2 - 2
then putting in equation we get
y°2 = x+2
adding these equations
x^2+x = y^2+y
x^2-y^2 +x-y = 0
(x-y) (x+y+1)=0
( x-x^2+2 ) (x+x^2-2+1) = 0
( x^2- x-2) ( x^2+x - 1) = 0
rest follows at once

[@sofianikolidou5640]

❤🎉 i enjoyed, thank you!!!!

[@learncommunolizer]

Thanks, You are so welcome! 👍♥️🙏

[@johnshaw6702]

I looked at it and said 2. Then I watch the vidio thinking there would be only two solutions. I wasn't expectig four solutions. I guess that shows how long it has been since I have done math at this level.
Thanks

[@burlfromlondon]

At 7:15 need another closing bracket, but didn't change results as you continued as if it was present

[@argoonz1]

I do watched your videos and you are good. My only comment is parenthesis is like this ( and bracket is this [. But 4u they are the same.

[@andresrebolledobanquet1924]

X^4 -2*x^2 + 4
x^4 - 4x^2 + 4 = x+ 2
F(x) = 4x^3= 12x^2
12x^2 - 4x^2 = 8x^2
F'(x)8x^2 = 16x
16x - x = 15x
15x = 2- 4
x = -2 / 15
x = - 0.13333

[@Janifo-br4mn]

X=2. La prima vedere.

[@Venezuela53]

Could you please write a correct one=1? The I is irritating

[@takacolonel4677]

ハーバードの試験問題が結構取り上げられてるけど、日本の受験レベルからするとそれほどでもないよね。

[@rydmerlin]

Fix the thumbnail :-)

[@learncommunolizer]

Thanks 🙏♥️🙏, fixed

[@KHMELNITSKI]

Х равно нулю,безо всяких манипуляций.