Question

`x^2 = 12`

Answer 1

\(x^2=12\\ =>\left[{}\begin{matrix}x^2=\left(\sqrt{12}\right)^2\\x^2=\left(-\sqrt{12}\right)^2\end{matrix}\right.=>\left[{}\begin{matrix}x=2\sqrt{3}\\x=-2\sqrt{3}\end{matrix}\right.\)

ko đăng lại nhé 

Answer 2

x
2
=
12
=>
⎡
⎢
⎢
⎣
x
2
=
(
√
12
)
2
x
2
=
(
−
√
12
)
2
=>
[
x
=
2
√
3
x
=
−
2
√
3

 

Answer 3

x2=12=>⎡⎢ ⎢⎣x2=(√12)2x2=(−√12)2=>[x=2√3x=−2√3x2=12=>[x2=(12)2x2=(−12)2=>[x=23x=−23

ko đăng lại nhé