Question

3.x²=27

Answer 1

\(3.x^2=27\\ =>x^2=27:3\\ =>x^2=9\\ =>\left[{}\begin{matrix}x=3\\x=-3\end{matrix}\right.\)

Answer 2

\(3.x^2=27\)

\(x^2=27:3\)

\(x^2=9\)

\(x^2=3^2\) hoặc \(\left(-3\right)^2\)

\(\Rightarrow x=\pm3\)

Answer 3

3.x²=27

=>x²=27:3

=>x²=9

=>x²=3²

=>x=3

Vậy x=3

Answer 4

3.x\(^2\)=27

   x\(^2\)=27:3

   x\(^2\)=9

  x=\(\sqrt{9}\)

  x=3