$ \sqrt{(-1)^2} \overset{?}{\ne} (\sqrt{-1})^2.\; $ Which of the following steps is wrong:
6650
Why $\sqrt{-1 \times -1} \neq \sqrt{-1}^2$?
155635
Why is the math for negative exponents so?
108923
What is wrong with this false proof? $-1=(-1)^1=(-1)^\frac{2}{2}=((-1)^2)^\frac{1}{2}=\sqrt{(-1)^2}=\sqrt{1}=1$
155285
difficulty of accepting $i^2 = -1$ for first timers
124209
How is $\ln(-1) = i\pi$?
68746
What is $f(f^{-1}(A))$?
17707
Why is ${x^{\frac{1}{2}}}$ the same as $\sqrt x $?
138972
When is R squared negative?
117320
Why is this true: $\|x\|_1 \le \sqrt n \cdot \|x\|_2$?
97952
Square root of 1 is (not) -1
115513
Find the minimum of $\sqrt{(x+1)^2+(y-1)^2}+\sqrt{(x+2)^2+(y+2)^2}+\sqrt{(x-1)^2+(y+1)^2}$ For real $x,y$
151930
What does it mean by $t=-1$?
122226
Incorrect logic in popular proof of the irrationality of $\sqrt2$?
60261
Is $\sqrt{x^2}=|x|$ or $=x$? Isn't $(x^2)^\frac12=x?$
142768
Approximation of $\sqrt{2}$
132610
Expand $\sqrt{1-x}$ up to and including the term $x^2$ (How should i proceed further)
94601
Mathematical Induction Question About A Basis Step