Hello,

I understand that

Then

But what if I have

Would that be x=2(plus/minus y) or would the -2 have to be included in the plus/minus part?

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- Sep 27th 2010, 08:47 AMLord DarkinCurious about the plus/minus aspect of square roots
Hello,

I understand that

Then

But what if I have

Would that be x=2(plus/minus y) or would the -2 have to be included in the plus/minus part? - Sep 27th 2010, 10:38 AMemakarov
is a contraction for "x=2

**or**x=-2". Even though may seem a number, like y or -y, it cannot be viewed in isolation. Usually one has some proposition (i.e., an expression that is either true or false) . This means " or ". Therefore, " " and " " are the equivalent and mean "x=2y or x = -2y". - Sep 28th 2010, 05:02 AMearboth
- Sep 28th 2010, 05:10 AMHallsofIvy