Announcements
- The college is on a Monday schedule on tomorrow (Thurs Feb 22), so we will have class tomorrow
- WebWork schedule:

Topics
We reviewed Quiz #1:


We did some WebWork exercises on “factoring by grouping” (Sec 1.2.6):

We revisited the exercises above the quiz and “reversed” them–we factored the resulting quadratics by factoring by grouping:

We then introduced the “ac-method” for factoring quadratic polynomials (ax^2 + bx + c), by first looking at the simpler case when a=1:

See Examples 1.2.7.1 and 1.2.7.4 in Sec 1.2.7.
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