# Help with rearranging equation

##### New member
Hi,

In my book it says that the equation ax²=b can be written in the form x²=a/b but I don't understand how they've done that.

If I were to rearrange it, I always get x²=b/a because I think since the b is already on the right, the a must go underneath.

Is there some rule that lets you rearrange as my book says or is it wrong?

Thank you very much.

#### Dr.Peterson

##### Elite Member
Hi,

In my book it says that the equation ax²=b can be written in the form x²=a/b but I don't understand how they've done that.

If I were to rearrange it, I always get x²=b/a because I think since the b is already on the right, the a must go underneath.

Is there some rule that lets you rearrange as my book says or is it wrong?

Thank you very much.
The book is wrong. You are right.

Unless there's something you've left out or assumed; can you show us an image of what the book says in context?

##### New member

Sorry for the poor quality.

#### Dr.Peterson

##### Elite Member
I suspect they are thinking only of the form (a ratio of two quantities), and not of the actual result from the previously given equation (treating a and b as the same values as before). But even so, it's very misleading, and I'd call it a mistake.