Question

If x^2=4 then x=2 pleas help me ​

Answer 1

$x^2=4\Longrightarrow x=4^{2^{-1}}=4^{\frac{1}{2}}=\sqrt{4}=\boxed{2}$

So the first one is correct which implies that the third one is also correct.

But these are not the only ones.

$2x=2\Longrightarrow x=\dfrac{2}{2}=\boxed{1}$

The last one is also correct.

Hope this helps.

r3t40