Square Root - Positive or Negative?
Posted: Fri Sep 02, 2011 9:43 amWhen we write we mean the positive square root of x. So for instance:
On the other hand, if we are solving we take the square root of both sides and obtain, We add the plus or minus symbol to remind us that we are looking for both the positive and negative square root. The reason we want the negative square root is because it is also a solution to our original equation:
If you have any more questions just reply to this post!
On the other hand, if we are solving we take the square root of both sides and obtain, We add the plus or minus symbol to remind us that we are looking for both the positive and negative square root. The reason we want the negative square root is because it is also a solution to our original equation:
If you have any more questions just reply to this post!