case 1

Day 4 Clip 1

Prior to this clip, Ms. Coombs reviewed how distribution expands a polynomial in factored form.

 

Day 4 Clip 2

Ms. Coombs leads the students to use the distributive property to expand
y = (x + d)(x + e) as a way to test and generalize their hypothesis about how to generate the expanded form.

 

Day 4 Clip 3

Ms. Coombs leads the class through the factoring of the polynomial
y = x2 – 2x – 24.

 
Day 4 - Clip 1

Prior to this clip, Ms. Coombs reviewed how distribution expands a polynomial in factored form. As an example, she used y=(x+4)(x+3) to get
y = x2 + (3+4)x + (4)(3). She then directs the students to imagine working the problem backwards, without the aid of a graph. The students guess as to how this may be done.

 

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