Question

Tìm x biết:

\(3x^4\) - \(24x\) = 0

Các bn giúp mik vs

 

Answer 1

=>x(x-2)=0

=>x=0 hoặc x=2

Answer 2

\(3x^4-24x=0\\ \Rightarrow3x\left(x^3-8\right)=0\\ \Rightarrow\left[{}\begin{matrix}3x=0\\x^3-8=0\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=0\\x^3=8\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=0\\x=2\end{matrix}\right.\)