Dear Learning Community:

We have been studying the steps necessary to factor an algebraic expression. In addition, we have reviewed multiplying a binomial by another binomial. Below there are three samples of student answers. You will be assigned to evaluate one of the three students work. Please state whether you agree or disagree with this student's work and justify your response.

Student 1: Multiply: (3x + 2)^2 =

(3x + 2) (3x + 2) =

9x^2 + 4

Student 2: Factor completely: 5x^2y - 10xy^2

5x(xy - 2y^2)

Student 3: Factor completely: 5x^3 - 45x =

5x(x^2 - 9) =

5x(x + 3) (x - 3)

Your comments should be received by the close of business on Friday, October 23, 2009.

Sincerely,

Ms. Budney

## Monday, October 19, 2009

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