What is the positive root of the equation x 2 - 2x = 120

QUESTION POSTED AT 01/06/2020 - 03:49 PM

Answered by admin AT 01/06/2020 - 03:49 PM

There is a shortcut.

It can be converted to (x-1)^2 = 121

If you know 121 = 11^2

Then you get x-1 = 11 or -11, so x = 12 or -10
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