Why is it when you square root a number you get a +/-? Why is it when you solve it is -16 and not 16? How can you tell it is +/- for the second question?
Follow Math Help Forum on Facebook and Google+
You get a when you take the square root of a number because both the positive and negative square roots could be the factors: e.g. and
So, if it is not in ()'s I assume it is -(4)(4)? Why is it then in some cases it is always is always 16?
Originally Posted by Barthayn So, if it is not in ()'s I assume it is -(4)(4)? Why is it then in some cases it is always is always 16? In my studies has always been taken to equal . Maybe sometimes people get lazy and leave out the parentheses, or don't see a distinction between the two...
View Tag Cloud