2. Two students factored 2x2 + 6x - 20. Keiko said that the factorization was (2x - 4) (x + 5). Ray gave the factorization as (x - 2) (2x + 10). Confirm that both of these factorizations are correct. Then explain why they are not complete.

3. Explain the relationship between the factors of a quadratic expression, the roots of the related quadratic equation, and the x-intercepts of the graph of the related function.

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