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?

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- Jan 1st 2010, 05:59 AMBarthaynnegative root?
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?

- Jan 1st 2010, 06:15 AMStroodle
Hi there

but

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 - Jan 1st 2010, 06:18 AMBarthayn
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?

- Jan 1st 2010, 06:19 AMArchie Meade

- Jan 1st 2010, 06:23 AMStroodle