Question

\(^{x^{20}-4x^{18}=0}\)

Answer 1

\(x^{20}-4x^{18}=0\\ < =>x^{18}\left(x^2-4\right)=0\\ < =>x^{18}\left(x-2\right)\left(x+2\right)=0\\ < =>\left[{}\begin{matrix}x^{18}=0\\x-2=0\\x+2=0\end{matrix}\right.\\ < =>\left[{}\begin{matrix}x=0\\x=2\\x=-2\end{matrix}\right.\)

Answer 2

\(x^{20}-4x^{18}=0\)

\(=>x^{20}=4x^{18}\)

\(=>x^2=4\)

\(=>\left[{}\begin{matrix}x^2=2^2\\x^2=\left(-2\right)^2\end{matrix}\right.=>\left[{}\begin{matrix}x=2\\x=-2\end{matrix}\right.\)

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