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4-28.

Factor the following expressions, if possible. Homework Help ✎

  1. Use an area model and a Diamond Problem.

  2. Insert a between the and the .

  3. The expressions in parts (a) through (c) are trinomials while part (d) is a binomial, yet they are all quadratic expressions. What makes each of them a quadratic? Justify your responses.

    What is the highest power of the variable in each of the problems?