Question

[Nguyễn Thái Đức]

Singapore is the smallest country in Southeast Asia but Singapore is the most developed country.

I have a question: x^3+x-x^4-1=0 (Find x)

Answer 1

[shitbo]

You are a young buffalo bruh

\(-x^4+x^3+x-1=x^3\left(1-x\right)-\left(1-x\right)=\left(x^3-1\right)\left(1-x\right)=\left(x-1\right)\left(1-x\right)\left(x^2+x+1\right)=0\)

then x=1 since \(x^2+x+1=\left(x+\frac{1}{2}\right)^2+\frac{3}{4}>0\)

and the final answer is 1

Answer 2

[Nguyễn Thái Đức]

Good news:

- I traveled from Singapore to Vietnam yesterday!!! Yay !!!(Of course by plane)

- Now i am learning 2 languages(Vietnamese & Englis)