Question

Can anyone help with pre- alerba

Answer 1

Answer:

$\sqrt{x^2} = |x|$

Step-by-step explanation:

$\sqrt{x^2} = |x|$

The radical symbol when used for a square root means the non-negative  square root. You cannot state that sqrt(x^2) = x because x may be negative. That is why you need use the absolute value symbol.