Why is this response incorrect? There’s no solution tab for this question either.
You can assume that \sqrt{x^2} = x and see if it works for something like x = -2.
\sqrt{(-2)^2} = 2 \neq -2
In general, you have that \sqrt{x^2} = |x|, because as you’ve seen above the signs don’t check out for negative values of x, and so the absolute value takes care of this issue.
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Thanks, this is helpful.