What's the logic behind this economics problem?

Ali D

New member
I'm pretty bad at math so I don't get this.
TR (total revenue) = 7Q1 - 0.025Q1 squared (as in to the power 2, I don't know how to put it with a keyboard)
When we get Marginal Revenue, it becomes this:
MR = 7 - 0.05Q1

As you can see, it's a difficulty in understanding Math. It's obviously not the square root, so what do you do to come at 0.05 from 0.025?
 
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