Question

Please help me, Find the mistake,
$\sf \sqrt{ - 1} = \sqrt{ - 1}$
$\sf \implies \sqrt{ \frac{ - 1}{1} } = \sqrt{ \frac{1}{ - 1} }$
$\sf \implies \frac{ \sqrt{ - 1} }{ \sqrt{1} } = \frac{ \sqrt{1} }{ \sqrt{ - 1} }$
$\sf \implies \sqrt{ - 1} \times \sqrt{ - 1} = \sqrt{1} \times \sqrt{1}$
$\sf \implies - 1 = 1$
How?
Where is the mistake?
Plz,
Don't write irrelevant contents. ​

Answer 1

I THINK SO...

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