Ok, so obviously 1 is not equal to 0, but I will go through a simple few lines of algebra that seem reasonable at first glance, but lead to the shocking conclusion that 1=0. It is a good test of your basic understanding to show me why this is wrong... see if you can find the error and let me know!

We start with the equation

Now multiply both sides by to get

Subtracting one from both sides gives

Factorize the left hand side and divide both sides by .

The factors cancel to leave

or

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