Chapter 21
Ten Things to Forget
This is without question the easiest chapter in the book. There’s nothing to study, nothing to comprehend, nothing to learn. Just kick back, crank up the music, and forget this stuff.
— Wrong!
Don’t confuse this with 
, which is right. 
equals 
.
— Wrong!
Don’t confuse this with 
, which is right. 
can’t be simplified.
Slope = 
— Wrong!
This is upside down. Slope equals 
.
— Wrong!
You can’t cancel the 3as because it’s not a factor of the numerator and the denominator. ...
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