Question

Answer 1

\(x^2=64:16\\ x^2=4\)

=> x = 2 ; x=-2

Answer 2

x²=4

=>x=2

Answer 3

\(16 x^2=64\)

\(x^2 = 64:16\)

\(x^2 = 4\)

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

Answer 4

`16x^2 = 64`

`=>  x^2 = 64 : 16`

`=>` \(\left[{}\begin{matrix}x^2=4\\x^2=-4\end{matrix}\right.\)

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

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